Wire Dispatch: :Navy tells Bush Iran incident 'serious'

"Iran also is a main issue of Bush's trip, particularly in the five Arab nations he is visiting. Nervous about Iran's military might and rising influence, the leaders of these nations also are anxious about the confrontation between U.S. and Iranian naval vessels off their shores. Arab allies want assurances that Bush is not interested in starting a war that could threaten military bases on their soil or the lucrative oil trade through the Strait of Hormuz. But they also want security commitments from the president." ... Now what are "security commitments"?