From the booklet introduction:
Blazing Angels 2: Secret Missions of WWII centers on a group o three elite pilots, assembled from the beginning of the war into a special, secret team with one purpose: to take on the most difficult missions around the globe and solve any crisis that normal pilots couldn't handle. Created in early 1940 by the American government (theoretically not involved in the war at the time), the clandestine team works under the code name Operation Wildcard and is not bound by any rule. The three very different and quite colorful pilots, often helped by a fourth person - a British spy who handles operations on the ground - are not subordinate to any specific army and can move at any time, to any place or any army where they are needed. They're special and are treated as such: any plane they want, they get, and any brand-new technology that appears over the course of the war they have access to, even if this sometimes means snatching it themselves from the hands of the enemy. Prototype jet fighters and prototype weaponry, like sound-guided missiles or the even more exotic Tesla coil, are all available to them and are all needed, since their missions put them in the most perilous situations imaginable.