 645. I'm Michelle Bash. And I'm John Aaron. There is word that several U.S. military bases across Europe were put on a heightened state of alert this past weekend amid concerns of a possible terror attack targeting U.S. military personnel or facilities. According to a CNN report, one U.S. official who's stationed at a base in Europe says the threat level hasn't been this high in at least a decade. And when it happens, it usually means the military has received an active, reliable threat.