ADVANCE FOR SUNDAY, AUG. 19 AND THEREAFTER - FILE - In this April 9, 1993, file photo then-Sen. Joe Biden, D-Del. stands in front of a Danish armored personnel carrier at the UN-controlled Sarajevo Airport, making a statement about his trip to the besieged Bosnian capital. In May, after Joe Biden tripped up his boss by voicing support for same-sex marriage while the president remained on the fence, there was speculation about whether the remarks were spontaneous or deliberate. But to those who know Biden, there was no doubt. He was just speaking his mind. (AP Photo/Michael Stravato, File)