In theory, the War Powers Act gives Congress the power to end a war. But our chief White House correspondent, Peter Baker, describes how President Trump is the latest president to find ways to engage in war without congressional approval.

Our investigative reporter Eric Lipton explains how earlier this month President Trump abruptly switched aircraft when leaving Turkey because of a credible threat that Iranian proxies were targeting a new Air Force One that had omitted key security modifications needed for a Qatari Boeing 747.