Photo: A computer console on board a NATO Boeing 707 E-3A AWACS. These aircraft are patrolling Allied airspace in Eastern Europe, in the wake of Russia’s attack on Ukraine. NATO’s Boeing E-3A Airborne Warning & Control System aircraft has a distinctive radar dome mounted on the fuselage which allows the crew to survey an area of more than 310,798 square kilometers, or about the size of Poland. Credit: NATO