The latest rankings put Tokyo's Haneda in third, South Korea's Incheon International Airport in fourth and Paris Charles de Gaulle in fifth.
US Air Force General James B Hecker revealed that before the incident, the Su-27 dumped fuel on and flew in front of the MQ-9 in what he branded a “reckless” manoeuvre.
The business said the change, along with other improvements to its charging processes, could allow its drones to shift to delivering millions of parcels a year.
Unveiled in December last year, the Northrop Grumman-built aircraft is the ‘sequel’ to the UFO-like B-2 Spirit and is designed to silently strike deep behind enemy lines with its 9,500 km range and advanced stealth capabilities.
Improvements are rolling out for the F-35 Joint Strike Fighter program as the global prime launches its Technology Refresh 3 upgrade.
Orders for new Block 70/72 variants of the F-16 Fighting Falcon continue to roll in for Lockheed Martin as the aircraft rapidly approaches almost half a century since its first flight on 20 January 1974.