Saw this in 1954 at the Dona Ana Army rifle range in New Mexico. When the separation of targets from the shooter is large, at each target below the ground is a pit for immediate evaluation of accuracy after shooting. Once, on such target marking detail, during a brake period between groups of shooters I saw a wingless cigar shaped object flying at a moderate speed in a straight line at approximately 10,000 to 15,000 ft elevation.