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.
A legend in its own right, the Ilyushin-2 Shturmovik is the number one anti-tank aircraft in the world, having destroyed more enemy tanks than any other aircraft during the war. It also holds the record as the most produced aircraft, with over 36,000 units built during the war. It was heavily armored and is the fastest ground attack aircraft in its class. The Germans called it the Black Death, while Stalin was quoted The Red Army needs the Il-2 as it needs air and bread.