"But the administration and the military have also muddied bottom lines by altering targets and categories of data. Multiple regular and special accounts have made it difficult to compute total war spending. Detainee numbers have oscillated, depending on whether the objective was to tout achievements or conceal secret prisoners. And convenient guesses have at times been offered as fact. "In February, Iraqi and coalition forces conducted just over 200 operations against al-Qaeda objectives, having killed over 100 terrorists and capturing over 400 terrorists," Maj. Gen. William B. Caldwell IV, spokesman for U.S. forces in Iraq, told reporters in Baghdad last week. Later in the briefing, Caldwell said he was sure about the 100 killed but said the 400 captured "will go through a screening process" to determine "whether or not they in fact were associated with the terrorists . . . or whether they were perhaps just innocent bystanders.""