Ukraine airshow disaster: A Sukhoi Su-27 fighter crashes during an air show at Lviv, Ukraine killing 77 and injuring more than 500 others, making it the deadliest air show disaster in history.

The Sknyliv air show disaster occurred on 27 July 2002, when a Ukrainian Air Force Sukhoi Su-27UB aircraft, piloted by Volodymyr Toponar and co-piloted by Yuriy Yegorov, crashed into spectators during an aerobatics presentation at Sknyliv airfield near Lviv, Ukraine. The accident killed 77 people and injured 543. It is the deadliest air show accident in history.

The Sukhoi Su-27 is a Soviet-origin twin-engine supersonic supermaneuverable fighter aircraft designed by Sukhoi. It was intended as a direct competitor for the large US fourth-generation jet fighters such as the Grumman F-14 Tomcat and McDonnell Douglas F-15 Eagle, with 3,530-kilometre (1,910 nmi) range, heavy aircraft ordnance, sophisticated avionics and high maneuverability. The Su-27 was designed for air superiority missions, and subsequent variants are able to perform almost all aerial warfare operations. It was designed with the Mikoyan MiG-29 as its complement.

Lviv is the largest city in western Ukraine, as well as the fifth-largest city in Ukraine, with a population of 717,500. It serves as the administrative centre of Lviv Oblast and Lviv Raion, and is one of the main cultural centres of Ukraine. Lviv also hosts the administration of Lviv urban hromada. It was named after Leo I of Galicia, the eldest son of Daniel, King of Ruthenia.