North American XB-70 Valkyrie

according to AWST), to which is docked a reusable spacecraft (XOV or "experimental orbital vehicle"). On 4 October, 1998, claims AWST, eyewitness James Petty of Salt Lake City saw "a small, highly swept-winged vehicle nestled under the belly of the XB-70-like aircraft. The vehicle appeared to be climbing slowly on a west-southwest heading. The sky was clear enough to see both vehicles' leading edges, which Petty described as a dark gray or black color". The orbiter apparently lands in a conventional