'ASK THE CHAIRMAN' U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, responds to a question from Petty Officer 2nd Class Andrew Krauss during the taping of "Ask the Chairman," a virtual town hall meeting, at the Pentagon, Sept. 10, 2009. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 643095-O-FYM70-939.jpg Photo Gallery