61.   In the past two weeks, an IRA bomb has demolished a London bus and another explosive device was deactivated by police.

62.   Investigators are still searching for conclusive evidence showing whether the plane was destroyed by an explosive device or mechanical failure.

63.   Investigators have seized on the idea of a static spark or a tiny explosive device, neither of which would necessarily have left enough evidence to be detected.

64.   Investigators will closely monitor debris for any signs of an explosive device, sources said.

65.   It gave few other details nor did it clarify what kind of opponents may have planted the explosive device.

66.   Instead, they say they are looking for evidence of a sophisticated explosive device, possibly hidden in an obscure area of the plane.

67.   Kaczynski has not been charged in any of the Unabom attacks and is being held on a charge of possessing an explosive device.

68.   Kaczynski is charged with mailing or delivering four explosive devices with intent to kill.

69.   Ladar said officials found additional fertilizer at the Sonoma residence and an unknown white powder that was detonated underground at the property but no explosive devices.

70.   Learned said security at the various hotels, motorcade routes and other venues used by the visiting VIPs includes regular sweeps for explosive devices, weapons and anything suspicious.