Appointment of Army veteran and ex-lobbyist ends longest-ever Pentagon leadership vacuum in American history

Expected confirmation would end seven months without Pentagon chief after Mattis resignation; Navy leader Richard Spencer takes over as acting defense chief

The US has no defense secretary and the temporary one just quit. His replacement might only stay for six weeks; top Democrat calls situation 'appalling'

Army Secretary Mark Esper will come in as acting Pentagon leader amid rising tensions in the Middle East

NATO's European commander says top officials from both countries may discuss issue at alliance meeting next week

After Putin talks, Turkish president gives indication of timeframe for missile defense system's arrival, which may lead to Washington kicking Ankara out of F-35 fighter jet program

Washington says it may kick Ankara out of F-35 fighter jet program for deal with Russians; Turkish foreign minister: Country won't bow to 'ultimatums'

Trump says he doesn't think extra troops needed, but 'we'll see what happens with Iran'

Officials say discussions include additional Patriot missile batteries, more ships and increased efforts to monitor Tehran

Poll finds Americans oppose preemptive strike on Islamic Republic, but huge majority supports massive retaliation if Iran attacks US forces