Speaking today in Iowa, Donald Trump attacked John McCain for being a former prisoner of war. Watch here:

"He's not a war hero," Trump, a Republican running for president, said of McCain. "I like people that weren’t captured. "He’s a war hero because he was captured. I like people that weren’t captured."

McCain, of course, was the Republican nominee for president in 2008.

In 1973, John McCain wrote a first-person account of being shot down over Vietnam and held in prison for over five years. You can read it here. Trump graduated from college in 1968, but avoided serving in Vietnam.