With July 4 celebration, did Trump politicize the military?

President Trump’s July 4 “Salute to America” heaped praise on the U.S. Armed Forces but also generated concern about potentially politicizing the military. William Brangham talks to Mike Lyons of West Point’s Modern War Institute and Peter Feaver of the Triangle Institute for Security Studies about whether the president crossed the line and the risk of involving the military in a “civic photo op.”