RCAF Snowbirds - Double Diamond Formation. The low ceilings and twilight made for dramatic backdrops during Yankee Air Museum's "Wild Wednesday" show. RCAF Snowbirds Big Diamond formation - Yankee Air Museum's "Wild Wednesday" twilight show. RCAF Snowbirds - Big-Vic Formation. The low ceilings and twilight made for dramatic backdrops during Yankee Air Museum's "Wild Wedneday" show. St. Thomas_Shawn YostCFB Borden_Kerry Newstead