You can also click the Add layer mask icon at the bottom of the Layers panel (which, by default, selects Reveal All). Note that if you already have a layer mask on the layer, this icon will change to Add vector mask. Or you can click the Add a Layer Mask icon in the Properties panel.
The top American ace of all time, the U.S. Ace of Aces was Richard Ira Bong. He shot down 40 Japanese planes in the Pacific. Over the years, there's been a lot of ink spilled about the relative scores of German and American aces. 27 Americans shot down over 20 enemy planes.
F-14 Tomcats from the Red Sea and Persian Gulf await their turn refueling from a KC-10A over Iraq during Desert Storm while conducting a MIGCAP mission to turn back fleeing Iraqi fighters. The first week of the air war saw a few Iraqi sorties, but these did little damage, and 38 Iraqi MiGs were shot down by Coalition planes.