have been killed and more than 180, more than we thought, were injured yesterday. with me now, dr. william mackey, che chief of surgery at tuft's medical center. thank you for joining us. i was looking yesterday, the first part of the tragedy that struck me was the number of hospitals up in the boston area all with so many patients now in serious problems. serious threat to their lives. what was it like yesterday? what's the situation in your hospital? >> it was extremely hectic right from the get-go. the event occurred about 2:50. by 3:30 or a little bit before, we had victims rolling in. we got about nine people from the scene within about a ten-minute period. eight of them had pretty serious injuries. four of them immediately limb threatening injuries. they were triaged through our system quickly and within about 30 minutes, 4 of them were in the operating room here.