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NASA mulls ‘what-ifs’ of unmanned space station

WASHINGTON — NASA is mulling the worst-case scenarios of leaving the $100 billion International Space Station unstaffed for a period of time following the crash of a Russian rocket, US astronauts said Tuesday. Two Americans aboard the ISS, Ron Garan and Mike Fossum, told reporters in a video press conference…

Army recalls 44,000 helmets that failed ballistic tests

WASHINGTON — The US Army has recalled 44,000 helmets that failed ballistic tests and federal authorities are investigating the firm that manufactured them, officers said on Monday. The helmets, made by ArmorSource in Hebron, Ohio, were issued to American troops since 2007, including an unknown number of soldiers in Iraq…