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Negotiators push for more talks after US and Iran convene in Oman

U.S. and Iranian officials convened in Oman on Friday, opening the door to a modest easing of tensions even as American warships mass in the Arabian Sea.

Opinion

Biodefense is core defense

It's crucial that NATO nations quantify their biological defense activities and count them toward NATO's 3.5% core defense spending target.

Watch the US Air Force load inert nuclear bombs in F-35 for tests

The unarmed nuclear bombs were dropped from an F-35A at the Tonopah Test Range in Nevada.

Pentagon wants ‘calculated’ risk culture in weapons buying revamp

The Pentagon said its overhauled acquisition strategy emphasizes — but doesn't mandate — speed in weapons buying.