At the same time, Ukrainians started to work on the restoration of two MiG-25 and one MiG-25UB aircraft, which were mainly used for reconnaissance of enemy positions from the air. These aircraft were one of several dozen Libyan MiG-25 fighter jets stored for decades after being decommissioned at Al-Juffrah air force base (and so were spared from destruction in NATO-led intervention in 2011 because they weren't considered a threat to NATO-led forces), and these MiG-25 aircraft were relocated by pro-GNA forces from the Al-Juffrah air force base to the Misrata air force base at the beginning of 2015 in order to be overhauled, repaired and returned to active combat service. One of those newly restored aircraft, a two-seat MiG-25PU trainer version, crashed during its first post-restoration flight on 6 May 2015—(LNA claims that it shot it down, but that remains unconfirmed), during a bombing run on positions of pro-LNA forces at the civilian airport at Al-Zintan. Its pilot, colonel Hassan Mahmoud Misrati, successfully ejected and was captured by the pro-LNA forces. Despite poor performances in the war, pro-GNA forces with the help of Ukrainian specialists continued to overhaul and repair more MiG-25 fighter jets through 2017 and 2018 in order to bring them back to active combat service.