61.   These chemicals could be dispersed by unmanned aircraft, causing enemy tires to deteriorate and fail.

62.   The United States used unmanned aircraft to track down targets in Afghanistan.

63.   The unmanned aircraft carry cameras, sensors and communications equipment.

64.   The use of unmanned aircraft has become an increasingly common tool for U.S. intelligence-gathering operations.

65.   He said aerial photographs by unmanned Predator drone aircraft, taken before and after bombing attacks, had provided evidence of large-scale killing.

66.   The sources said a Lufthansa passenger plane nearly collided with a military unmanned aircraft while crossing the Indian border into Pakistan.

67.   Other unmanned aircraft also were favored.

68.   The Iranian army plans to export unmanned aircraft, a leading official from the defense ministry said Wednesday.