According to the Los Angeles Times, Vulcan Warbirds, one of Allen's companies, is suing the Collings Foundation over a rare Panzer IV, a vintage tank that Allen says he paid $2.5 million for in July.

Segments explore the capabilities of the German-built Panzer IV tank and the Soviet T-34 tank, used primarily during World War II; the U.S. Army's M48 and M60 "Patton" tanks used to fight the Cold ...