A military training aircraft has crashed in Bulgaria, killing both pilots, Defence Minister Atanas Zapryanov said on Friday. The L-39 ZA aircraft – first designed in the former Czechoslovakia – was being used to practise for an air show planned for this Saturday when it crashed near the Graf Ignatievo airbase in southern Bulgaria. The event, which was to mark the 20th anniversary of Bulgaria’s accession to NATO, was subsequently cancelled. President Rumen Radev, a former fighter jet pilot and head of the air force, was a co-pilot in a demonstration flight of a US F-16 fighter jet before the in…