The new Air Force inherited the 184th Guards Heavy Bomber Aviation Regiment (201st Heavy Bomber Aviation Division) of Tupolev Tu-160 'Blackjack' which were based at Pryluky. Discussions with Russia concerning their return bogged down. The main bone of contention was the price. While Russian experts, who examined the aircraft at Pryluky in 1993 and 1996, assessed their technical condition as good, the price of $3 billion demanded by Ukraine was unacceptable. The negotiations led to nowhere and in April 1998, Ukraine decided to commence scrapping the aircraft under the Nunn-Lugar Cooperative Threat Reduction Agreement. In November, the first Tu-160 was ostentatiously chopped up at Pryluky. In April 1999, immediately after NATO began air attacks against Serbia, Russia resumed talks with Ukraine about the strategic bombers. This time they proposed buying back eight Tu-160s and three Tu-95MS models manufactured in 1991 (those in the best technical condition), as well as 575 Kh-55MS missiles. An agreement was eventually reached and a contract valued at $285 million was signed. That figure was to be deducted from Ukraine's debt for natural gas. A group of Russian military experts went to Ukraine on 20 October 1999 to prepare the aircraft for the trip to Engels-2 air base. Between November 1999 and February 2001 the aircraft were transferred to Engels. One Tu-160 remains on display in Poltava.