I was stationed at Ramstein Air Force Base Germany at the time. I was taking computer based tests to study for my job when a bunch of office folks started chattering about something happening in New York City. They brought a TV into the room next to where I was taking tests when all of a sudden everyone in the room immediately yelled, gasped, and cussed all at once! This was the exact moment the 2nd plane had hit the second tower. Our Sgt bolted to the radio room and ordered us all on high alert pending further orders. The rest of the day I patrolled Ramstein Air Base with the rest of my unit as we continued to get info about what was happening back in the states.