During a House Armed Services Committee hearing on March 25, 2010 concerning the U.S. military installation on the island of Guam, Johnson said to Admiral Robert F. Willard, Commander of U.S. Pacific Command, "My fear is that the whole island will become so overly populated that it will tip over and capsize", to which Admiral Willard replied, "We don't anticipate that." Johnson first attempted to explain these remarks by saying that he was taking a prescription medication which made him sound incoherent and clouded his thinking. That brought the question as to why he was conducting Congressional business when he was not medically competent.