CBS Mar 02, 2021 9:00 PM ET The attack was just hours away when Major Alan Johnson got the word Iran’s most powerful weapons were aiming for Al Asad. Alan Johnson: My intelligence officer pulled me aside and basically said, “Sir, I’ve got some bad news for you.” “What’s up?” (LAUGH) “We have information that Iran is fueling 27 medium-range ballistic missiles and their intention is to level this base and we may not survive.” Tim Garland: This is a completely different threat. Lt. Col. Tim Garland commanded an Army battalion at Al Asad, a sprawling airbase about 120 miles west of Baghdad where the U.S. operated scores of helicopters, drones and other aircraft.