Bulgarian Air Force chief Maj. Gen. Roumen Radev submitted his resignation letter on Oct. 1. By the end of the day, Radev withdrew his resignation after speaking to Prime Minister Boiko Borissov.
By Aldo Bidini [GFDL 1.2 or GFDL 1.2], via Wikimedia Commons
It was speculated that Radev suddenly reign after he got frustrated for not being able to push thru a program to buy new fighters for the service.