U.S.: No Sign of Iraq Bio-Weapons Yet Mar 23, 5:37 AM (ET) By ROBERT BURNS WASHINGTON (AP) - U.S. troops hunting in Iraq for banned chemical and biological weapons and Scud missiles have so far come up empty, the Pentagon says. Iraq denies U.S. assertions it has any chemical or biological weapons, and Maj. Gen. Stanley McChrystal, vice director of operations for the Joint Chiefs of Staff, told reporters that none had been found. The United States will either bomb any such armaments it should find or seize them with ground forces, whichever is safer, he said Saturday. The Iraqis have not fired any Scuds, and Special Operations forces searching airfields in Iraq's far western desert have uncovered no missiles or launchers, McChrystal said. Iraq denies having any Scuds, which have sufficient range to reach Israel, but Gen. Tommy Franks, the war commander, said Iraq has yet to account for about two dozen of the missiles, which U.N. inspectors have said were left over from the 1991 Persian Gulf War. Questions about the banned weapons were apt to be raised when Defense Secretary Donald H. Rumsfeld and Air Force Gen. Richard Myers, chairman of the Joint Chiefs, made the rounds of the Sunday television talk shows. ...