Oil Halted News Today

Well is leaking. david muir reports. >> reporter: it was the moment the people of the gulf have been waiting for, for nearly three months now. the oil halted. we watched as it slowed down and then for the first time since april 20th disappeared. it came after bp engineers closed those three separate valves. the first one. then bp tweeting about the second one at 11:30 a.m. eastern. the third, the choke line, at 1:30 eastern. at 2:15 bp tweets, the well integrity test was starting. an hour and te...