 Complete the following phrase:  On 28 June 1937 Kokkinaki flew the circular Moscow  Sevastopol  Sverdlovsk  Moscow route, a distance of 5018 km, with a DB-3, setting a record in both speed at 5000 km range with a median speed of 325 kmh and range on a circular route. This flight was followed three months later by the 4000 km Moscow  Baku  Moscow route. On 2728 June 1938, on board a modified TsKB-30 named Moskva, with A.M. Bryandinskiy as his navigator, Kokkinaki flew from Moscow to Spassk-Dalny in the Soviet Far East, covering a distance of 7,580 km in 24 h 36 min, mostly at an altitude of 7000 meters, with an average speed of 307 kmh. For this feat, he was awarded the title Hero of the Soviet Union on 17 July. On 28 April 1939, with Mikhail Kh. Gordienko as co-pilot, he tried to surpass this feat by performing a non-stop east-west transatlantic flight from Moscow to New York City, to coincide with the opening of the 