This afternoon, Joint Chiefs of Staff Chairman Mike Mullen sat down with John Hockenberry to talk about the U.S. military's role in the Haiti relief effort and terrorism in India and Pakistan. But the country's highest ranking military official also told us how he finds the time to send frequent Twitter updates: He credits his wife.

Tune in tomorrow to hear the full interview with Adm. Mullen, where he tells us that the U.S. facility at Guantanamo Bay Cuba is available for Haitian earthquake casualties, among other things.