Arthur Szyk's Earliest Cartoons - A Polish-American art collector in Southern California came across four striking drawings while browsing an online auction. He believes they bear a remarkable resemblance to the work of one of America's most influential political cartoonists, Arthur Szyk. HISTORY DETECTIVES investigates whether these drawings are some of the earliest known works of the man whose illustrations helped persuade America to fight the Nazis in World War II and whom Eleanor Roosevelt described as "a one-man army against Hitler." Professor Lowe's Hot Air Balloon - A collector from Midland, Michigan, may have purchased a fragment of American aviation history. At first glance, it's a simple piece of frayed material in a frame. But on the back of the frame are the words, "A piece of Prof. Lowe's Aeronautical balloon `Enterprise'... after it was destroyed upon landing ... in 1862." Could this be an artifact from the dawn of American military airpower? HISTORY DETECTIVES reveals more about the ambitious and fascinating professor who launched the country's first aeronautic division by inflating his hot air balloon, the Enterprise, on the lawn of President Lincoln's White House. Chemical Warfare Map - A San Antonio, Texas, resident inherited a map of a World War I French battlefield from her grandfather, an engineer under General Pershing. The map is of St. Mihiel, where U.S. forces fought for the first time in Europe unaccompanied by French or British forces. The map also includes detailed warnings about what to do in the event of a gas attack. Could this be an authentic relic from this critical battle? HISTORY DETECTIVES sheds light on the origins of gas warfare and on a battle that helped pave the way for the Armistice.