Air Force chief BS Dhanoa on Thursday flew solo in a MIG-21 fighter jet, the oldest fighter aircraft in the IAF's inventory, a defence statement said. Air Chief Marshal Dhanoa flew the MIG-21 Type 96 aircraft from the IAF base at Uttarlai, a forward base in Rajasthan, where he began a three-day visit, his first to a forward operational base as the IAF chief.