Sparky Barnes sent in this photo with a note: “1920s biplanes await their turn to fly. They are (L-R) a 1928 Waco GXE, a 1928 American Eagle, and a 1929 Command-Aire 3C3. These flyable biplanes are part of the Ala Doble Flying Collection in California.”
Source: general aviationPicture of the Day: Waiting to fly