Senate Armed Services Committee Chairman John McCain says the Trump administration needs to explain how four U.S. soldiers were killed in Niger. Bryan Black, Jeremiah Johnson, Dustin Wright, and La David Johnson were told not to expect enemy contact on that mission to meet with community leaders two weeks ago. It will take an investigation to determine if any warning signs were missed, but Sen. McCain says the administration is not being upfront and he's demanding more information about the attack. In a pre-mission briefing they were told "no enemy contact expected," but the group, about 40 in all, were...