Russian culture jet Tupolev Tu-144 by Alexei Tupolev, MiG fighter aircraft series by Artem Mikoyan and Mikhail Gurevich, and Su series by Pavel Sukhoi and his followers. MiG-15 is the world's most produced jet aircraft in history, while MiG-21 is most produced supersonic aircraft. During World War II era Bereznyak-Isayev BI-1 was introduced as the first rocket-powered fighter aircraft, and Ilyushin Il-2 bomber became the most produced military aircraft in history. Polikarpov Po-2 "Kukuruznik" is the world's most produced biplane, and Mil Mi-8 is the most produced helicopter. Famous Russian battle tanks include T-34, the best tank design of World War II,
2015 Russian Sukhoi Su-24 shootdown commander said missiles fired from Russian warships in the Mediterranean were also hitting the area. Russian Defence Ministry spokesman Igor Konashenkov said that as soon as the pilot was rescued the groups responsible for the attack had been killed by Russian bombing and Syrian government rocket artillery. A Turkish supply convoy, reportedly carrying small arms, machine-guns and ammunition, was bombed by what is believed to have been Russian airstrikes in the northwestern town of Azaz, in north-western Syria. Claimed as an aid convoy by the Turks, no organization has as yet confirmed that the convoy belonged to them. At least