The joint subcommittees are investigating the failed February 28, 1993 Alcohol, Tobacco and Firearms Bureau raid on the Branch Davidian compound near Waco, Texas in which four ATF agents were killed. Also under investigation is the April 19 FBI raid of the compound with tanks and tear gas and the resultant fire in which 80 cult members died, including their leader David Koresh. Federal agents testified about the two raids on the compound and the 51-day negotiations process between them.