• Source of radioactive poisoning in India found; nuclear watchdog seeks explanation

    Indian investigators find source of the cobalt-60 which poisoned several scrap-metal facility employees (one of them died last week): Delhi University bought a gamma irradiation machine from Canada in 1970 for use in experiments by chemistry students; the machine, which had not been used since the mid-1980s, was sold at an auction in February; scientists say that although the radioactive substance in the machine had decayed, it was of high intensity

  • Hiding explosives in plain sight: Searchers thrown off by multiple targets

    Researchers find that one strategy a terrorist might adopt is to carry explosives on his body - and liquid jell in his luggage; screeners would likely spot the jell, ask the passenger-terrorist to discard it - and, subconsciously influenced by “satisfaction of search,” move on to screen the next passenger; the research suggests that security might be improved if the screeners worked in a space where they could not see how many travelers were waiting in line and therefore did not feel pressure to hurry with the searches

  • DHS IG identifies weaknesses in airport passenger screening

    DHS IG inspects the operation of advanced passenger scanning technologies in sixteen unnamed U.S. airport, and reports: “We identified vulnerabilities in the screening process at the passenger screening checkpoint at the eight domestic airports we conducted testing”

  • Detecting sweaty, smelly security threats

    DARPA wants to be able to detect, track, and even positively identify them from a distance — and do so using nothing more than the heat and sweat that emanate from a person’s pores; DARPA envisions myriad civilian applications for the technology, including “identifying and tracking persons from the scenes of various crimes”

  • Taliban suspected in poisonous gas attacks on female Afghan students

    The Taliban is suspected in three separate poisonous gas attacks on girls schools in northern Afghanistan; eighty-eight girls were admitted to hospitals with what doctors describe as symptoms associated with “unknown gasses”; the Taliban banned education for women during its rule from 1996 to 2001, and girls education is still a controversial issue in Afghanistan today

  • How much radiation can the human body take?

    Radiation doses are measured in sieverts; each year we receive an average of 2.4 millisieverts from natural sources such as radon; the threshold for an early death is around 2 sieverts, and death is highly likely at 6 sieverts

  • Scent of a man: Odor-killing machine for hunters may aid terrorists

    A Texas-based company has developed a device for hunters which eliminates human odor, thus allowing hunters to get much closer to their prey unnoticed; trouble is, the same device may be used by terrorists to destroy the odor of explosives, thus allowing them to evade bomb-sniffing dogs at airports

  • Laser decontamination for post-chemical attacks, accident clean-up

    Many building materials — like cement and brick — are extremely porous; getting contaminants off surfaces like these is difficult, since they can inhabit cracks and pores; cleaning up chemical-contaminated structures can be difficult, costly, and time-consuming; what if terrorists attacked an urban center with chemicals? Researchers say the answer is to use laser to decontaminate an area after a terrorist attack or an industrial accident

  • Security specialist: Canada's new airport security scanners a waste of money

    An Israeli airport security experts tells Canadian lawmakers that full-body scanners can be easily fooled, and that they will not prevent explosives from being taken on board; he recommended the adoption of the Israeli approach to air travel security, which combines good intelligence, behavioral profiling, and a “trusted traveler” system

  • A pen-like device as a sensitive explosives detector

    Researchers develop a pen-size explosive detector; the sensitive detector can detect TATP, a peroxide bomb detonator used in many major terror attacks worldwide; the device is a disposable item that can be used by non-experts, like U.S. troops in the field, customs police, regular police, and even environmentalists

  • How safe are the world's nuclear fuel stockpiles?

    There is a lot of weapon-grade nuclear material in the world — 1,600 tons of HEU and 500 tons of separated plutonium; keeping these stockpiles safe will take more than barbed wire; one method is a seal for HEU fuel rods with a pattern of flaws visible on ultrasound scans that cannot be removed without leaving telltale signs; the seals were installed last year in Romania and Pakistan; scientists work on other detection and safety methods

  • TSA joins NYPD in subway baggage screening

    TSA joins BYPD in a trial for screening passengers’ baggage on New York subways; TSA says it does not know how long the agency would run the program, but that mass transit riders should anticipate a TSA presence underground “for the foreseeable future”

  • The U.S. faces severe helium-3 shortages; nuclear detection, science suffer

    The decay of tritium, the radioactive heavy-hydrogen isotope used in nuclear weapons, long produced more helium-3 than could be used; the United States stopped making new tritium in 1988, and so the remaining supply has been dwindling as it decays; the post 9/11 rush to build and deploy radiation detectors, however, increased dramatically the demand on the U.S. declining helium-3 resources — and now scientific research dependent on helium-3 suffers, and soon there will not enough even for security devices

  • They screen pets, don't they?

    The Israeli security authorities are now alerting pet owners that their pets, if they look like “suspicious animals,” may be subjected to X-ray screening before boarding; if the owners refused, the pet would not be allowed on the flight; more than four million pets are flown across the world each year

  • They screen pets, don't they?

    The Israeli security authorities are now alerting pet owners that their pets, if they look like “suspicious animals,” may be subjected to X-ray screening before boarding; if the owners refused, the pet would not be allowed on the flight; more than four million pets are flown across the world each year