Picture this: It is a clear summer evening on July 4, 1928. A private trimotor aircraft is cruising smoothly at 4,000 feet over the English Channel, carrying one of the wealthiest men on the planet. Moments later, he gets up to use the restroom, steps toward the back of the cabin—and vanishes entirely into thin air. Sounds like the setup for a gripping noir novel, right? But for true crime buffs and history lovers alike, the Alfred Loewenstein Disappearance remains one of the most puzzling, eerie unsolved mysteries of the 20th century. Grab a cup of coffee, settle in, and let us dive into the bizarre details of how a…