tara o'toole and thomas inglesby of the johns hopkins center for civilian biodefense strategies ( unk ) / center for strategic and international studies ( csis ) , and randy larsen and mark unk of analytic services were the principal designers , authors , and controllers of the dark winter project .

Bruce Edwards Ivins , a scientist at the government 's biodefense labs at Fort Detrick in Frederick , Maryland , became Becoming a focus around April 4 , 2005 .