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The XB-70 was a prototype strategic bomber for the [[United States Air Force]].  It had speed well over Mach 1, and thus was hard to destroy with fighter interceptors.  Only two were built for testing at [[Edwards Air Force Base]], [[California]].   

The XB-70 Valkyrie was a prototype strategic bomber for the [[United States Air Force]].  It had speed well over Mach 1, and thus was hard to destroy with fighter interceptors.  Only two were built for testing at [[Edwards Air Force Base]], [[California]].   

[[Image:XB-70_flight.jpg|thumb|right|An XB-70 in flight.]]

[[Image:XB-70_flight.jpg|thumb|right|An XB-70 in flight.]]