Ackermand et al.(2006): Lazulite-bearing metaquartzite of the Itremo Group (Central Madagascar); Scientific significance and economic importance in Proceedings of the Malagasy-German Research Cooperation in Life and Earth sciences, 5-18
The fastest fighter aircraft is the MiG 25, with speeds topping at Mach 3.2 (2,450 mph/4,000 km/h). Pilots were not allowed to go beyond Mach 2.8. Above Mach 2.8, the engines would overheat and burn up.
The plane is one of the fastest military aircraft to have entered operational service. The MiG-25 made its first flight in 1964, and was first used by the Soviet Air Defense Forces in 1970. The plane has an incredible top speed of Mach 3.2 (2,190 mph, or 3,524 km/h).