June 21 (UPI) -- The U.S. military has moved several B-2 Spirit stealth bombers and refueling aircraft to Guam, which may be a precursor to aerial strikes against Iran's most important nuclear facility. The deployment comes as President Donald Trump has announced a two-week pause to allow for potential cease-fire negotiations to end the hostilities between Israel and Iran. Trump also has said the U.S. knows where Iranian Supreme Leader Ali Khamenei is sheltering but won't target him with a