Author: Zachary Cohen and Barbara Starr, CNN

What we know about US military's program to train foreign troops

Pentagon programs to train foreign nationals are coming under new scrutiny after the man suspected of opening fire at Naval Air Station Pensacola in Florida Friday, killing at least three people and injuring several others, was identified as a member of the Saudi Arabian military.

Esper spars with Warren over ties to defense contractor

President Donald Trump's nominee for secretary of Defense, Mark Esper, appeared to sail through Tuesday's hearing before the Senate Armed Services Committee despite being grilled by a 2020 Democratic presidential candidate, Sen. Elizabeth Warren, over his ties to the defense contractor Raytheon, where he previously worked as a lobbyist.