21.   Johnson said chlorine used to treat drinking water would kill biological agents.

22.   Members of the sect killed four agents from the Bureau of Alcohol, Tobacco and Firearms, starting the standoff with the government.

23.   Officials had speculated on why Farace might have killed the agent, a veteran member of the federal Drug Enforcement Administration.

24.   Photographer Milton Travis picks up Ballard and Colfax and they race to the Federal Building, where they learn an FBI agent was killed.

25.   Still, that may be a reasonable decision in that Nichols may not have planned that the bomb be set off with the purpose of killing these agents.

26.   The most radical have bombed IRS offices and killed federal agents.

27.   The siege had begun nearly two months earlier with a failed raid by the Bureau of Alcohol, Tobacco and Firearms in which four BATF agents were killed.

28.   To do that, prosecutors must prove McVeigh killed federal agents who were on duty at the time of their deaths.

29.   Violence erupted again on Saturday in the troubled state of Guerrero when seven police agents were killed and three others were wounded in an ambush on a rural road.

30.   Weaver refused to surrender and allegedly threatened to kill federal agents who came to apprehend him.