Original sentence: The highest current world absolute general aviation altitude record -General Aviation World Records- achieved by a manned air-breathing jet propelled aircraft is  set by Alexandr Fedotov, in a Mikoyan Gurevitch E-266M (MiG-25M), on 31 August 1977
Edited sentence: The highest current world absolute general aviation altitude record -General Aviation World Records- achieved by a manned air-breathing jet propelled aircraft is an incredible  set by Alexandr Fedotov, in a Mikoyan Gurevitch E-266M (MiG-25M), on 31 August 1977