DNA Preservation in Skeletal Elements from the World Trade Center Disaster: Recommendations for Mass Fatality Management*,†

Abstract: The World Trade Center (WTC) victim identification effort highlights taphonomic influences on the degradation of DNA from victims of mass fatality incidents. This study uses a subset of the WTC‐Human Remains Database to evaluate differential preservation of DNA by skeletal element. Recovery location, sex, and victim type (civilian, firefighter, or plane passenger) do not appear to influence DNA preservation. Results indicate that more intact elements, as well as elements encased in soft tissue, produced slightly higher identification rates than more fragmented remains. DNA identification rates by element type conform to previous findings, with higher rates generally found in denser, weight‐bearing bones. However, smaller bones including patellae, metatarsals, and foot phalanges yielded rates comparable to both femora and tibiae. These elements can be easily sampled with a disposable scalpel, and thus reduce potential DNA contamination. These findings have implications for DNA sampling guidelines in future mass fatality incidents.     

Genetics and genomics of core short tandem repeat loci used in human identity testing

Over the past decade, the human identity testing community has settled on a set of core short tandem repeat (STR) loci that are widely used for DNA typing applications. A variety of commercial kits enable robust amplification of these core STR loci. A brief history is presented regarding the selection of core autosomal and Y-chromosomal STR markers. The physical location of each STR locus in the human genome is delineated and allele ranges and variants observed in human populations are summarized as are mutation rates observed from parentage testing. Internet resources for additional information on core STR loci are reviewed. Additional topics are also discussed, including potential linkage of STR loci to genetic disease-causing genes, probabilistic predictions of sample ethnicity, and desirable characteristics for additional STR loci that may be added in the future to the current core loci. These core STR loci, which form the basis for DNA databases worldwide, will continue to play an important role in forensic science for many years to come.     

Genetic analysis of 15 STR loci of Chinese Ewenki ethnic population

POPULATION: Almost all the Ewenki are found in HulunBuir Ewenki Autonomous Banner, Inner Mongolia province of China. Some Ewenki are nomads; others are farmers or farmer-hunters. A small number of them are hunters. Its national characters and languages belong to the Altai phylum.     

A shifting enemy: analysing the BBC’s representations of “al-Qaeda” in the aftermath of the September 11th 2001 attacks

This article seeks to explore how the BBC made sense of the al-Qaeda phenomenon in its flagship “News at Ten” bulletin during the aftermath of the September 11^th 2001 attacks. Using Critical Multimodal Discourse Analysis, it shows how the BBC’s representations function as a dynamic and continually shifting site upon which a range of fears, identities, discourses and forms of knowledge and power struggle and contend, and through which a number of different “al-Qaedas” manifest themselves. In particular, three shifting modes of visual and verbal representation are identified within the BBC’s coverage which each correspond to a separate understanding of al-Qaeda: the “Islamic” mode, the “Personalised” mode and the “Elusive” mode. These representations both draw upon and challenge the dominant discourses surrounding Islam, non-state terrorism and the identities of terrorist suspects, providing audiences with a variety of often conflicting ways of seeing and speaking about this entity. As such, the article provides insight into the complex nature of the BBC’s representations of al-Qaeda during its coverage of the September 11^th 2001 attacks, and shows how such complexity serves, albeit inadvertently, to legitimise the far-reaching counterterrorism policies that were enacted in the aftermath of these attacks.     

Tightened Immigration Policies and the Self‐Employment Dynamics of Mexican Immigrants

As the U.S. government has intensified its crackdown on illegal immigration in recent years, an important question to ask is how undocumented immigrants react to the stricter enforcement of immigration laws. This paper seeks to answer whether they increasingly choose self‐employment in an effort to avoid apprehension and subsequent deportation. To guard against endogeneity bias that might stem from increased enforcement in reaction to illegal immigration, the empirical analysis makes use of the September 11 terror attacks (9/11), which inadvertently triggered stricter immigration enforcement nationwide, as a natural experiment. Using a difference‐in‐differences approach and data from the Current Population Survey between 1996 and 2006, this paper examines the changes in the self‐employment choices of male and non‐citizen Mexican immigrants (a proxy for undocumented immigrants) compared to less‐educated Whites (the control group). The findings indicate that male and non‐citizen Mexican immigrants are substantially more likely (40 percent) to enter into self‐employment than less‐educated Whites after 9/11. The analysis further suggests that this finding is not driven by the 2001 recession that coincided with the terror attacks. The increased entries are mainly observed in the group that is most likely to be in the United States illegally and in those who face strong economic incentives. In addition, increased entries are not driven by increased unemployment among Mexican immigrants after the 9/11 event, but, rather, they reflect a change in the behavior of the unemployed Mexican immigrants, perhaps due to changes in perceived risks of detection and deportation.     

When Is Science Used in Science Policy? Examining the Importance of Scientific and Technical Information in National Research Council Reports

A frequent lament among researchers is that public policy makers should pay more attention to scientific and technical information (STI). If there is any single area where one might expect STI to be used in public policy making and agenda setting it is in science and technology policy. Many of the policy makers in science and technology policy are themselves scientists or researchers and presumably would prove especially receptive to STI. However, STI is only one of many types of information used in policy making and policy actors often differ in the extent to which they view STI as credible, particularly compared to other types of potentially policy‐relevant information. Research on credibility (the believability of information, information types, and media) has shown variance and policy makers’ “credibility maps.” Thus, some policy makers have preference for formal information generally and STI specifically, but others privilege raw data, personal experience, authority, history and anecdote, analogical reasoning, or conformance to ideology, to name just a few of the information choices. Here, we build on the current researchers’ previous bibliometrics‐based work and use data from 41 semi‐structured elite interviews with National Research Council (NRC) executives and staff and NRC committee members concerning the use of STI in reports issued by the NRC. Findings show that the use of STI in NRC reports varies according to the nature of the inquiry and the sponsor. Information used in the reports is based on not only the assessed credibility of information but also its perceived direct relevance and the availability of STI as compared to other types of information. In general, the amount of STI in the NRC reports tends to have modest effects on the likelihood that reports will be used in policy making or by the mass media. More important factors include the timing of the report with respect to political agendas, the party requesting the report, and the enacted roles of NRC staff members and committee chairs.     

Censors Get Smart: Evidence from Psiphon in Iran

Information controls are actions intended to deny, disrupt, monitor, or secure information for political ends. They can be implemented using a wide variety of technical and nontechnical means. Political contests over the control of information are heightened around important events, such as major anniversaries, armed conflicts, protests, and elections. In this paper, we offer a comparative case study of online censorship of the circumvention tool Psiphon during the Iranian elections in 2016 and 2013, drawing on unique access to analytics data from Psiphon. We find that the Iranian regime developed its censorship approach in two ways, deploying blocking that was more targeted and strategically timed in the more recent case. Evidence suggests that the regime relaxed censorship of Psiphon during the official campaign period for the 2016 election. The apparent objective of this new approach was to control access to information while minimizing the political consequences of doing so.     

Extending environmental justice research to religious minorities

For more than 30 years, significant research in the United States has found that racial and ethnic minorities suffer disproportionately from nearness to environmental disamenities compared with white non-Hispanics and that these results persist even controlling for poverty and “which came first,” the minorities or the disamenities. The engrained discriminatory findings of this environmental justice (EJ) research have led some to argue that we observe “systemic racism,” built into our social systems in ways that may be difficult to perceive. Yet, within the history of the United States, racial and ethnic minorities are not the only groups that have been systematically discriminated against; various religious groups also have histories of discrimination. Here we consider whether, holding constant race and ethnicity, some religious groups may also suffer from “EJ syndrome.” Since the US Census does not collect data on religion, to measure the presence of some religious groups that may be discriminated against, we use an original dataset on the presence of Jewish, Muslim, Church of Jesus Christ of Latter-day Saints (LDS, aka Mormon), and Roman Catholic houses of worship within California's Census tracts. Our results indicate that even controlling for race/ethnicity and income, the presence of Jewish or Muslim houses of worship in a California Census tract increases the likelihood of environmental burden as measured by the CalEnviroScreen 3.0 index of pollution and community vulnerability.