Contrail Over Brown Mountain

On a May of 2002 L.E.M.U.R. expedition, Brett Clark of Phenomena Productions captured these stills of an aircraft contrail over Brown Mountain. Though old and dispersed in these pics, it appeared similar to �donuts-on-a-string.� This pattern is often associated with experimental U.S. government aircraft that use timed pulse discharges for propulsion; especially the Aurora spy plane, capable of traveling 5-8 times the speed of sound. Is this significant?

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