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Miniature lasers could play a key role in sniffing out possible chemical or biological threats from safe distances.
An Iranian envoy said his nation held meaningful technical discussions with six other nations this week on its long-running nuclear dispute, Reuters reports.
International officials said Syria appears poised to miss a March 15 target date for eliminating a dozen chemical-arms manufacturing sites, Reuters reports.
Congressional auditors are telling the Energy Department it should collaborate more with other key agencies on developing ways to secure radiological items.
Lawmakers are urging new rules be issued under an existing Obama executive order.
China on Friday acknowledged that a recent North Korea ballistic-missile test put at risk a passenger airplane flying in its path, Reuters reported.
A senior U.S. diplomat stressed Russia's "self-interest" in eliminating Syria's chemical arms, as a rift grew between Moscow and other capitals over Ukraine.