AP Blue Sky Science: How do hot air balloons work? Jul 15, 2019 Facebook Twitter SMS Email Print Save Directionally you never know where a hot air balloon is going to go because the wind controls it. Tags Wire Field59 Blue-sky-science More video 'God Friended Me' Season 2 Trailer Emmys 2019: The small moments you may have missed 'Shark Tank' Season 11 Trailer Facebook Twitter SMS Email Print Save Most Popular Shooting victim’s family seeks answers weeks after man’s death Ax murderer, arsonist sentenced to 31.8 years in prison Rapid City police searching for driver who fled after hitting pedestrian Search ends for missing man in Custer Man killed in ATV crash near Edgemont More on this topic People are loving this pocket key organizer Sophia Loren, Valentino receive standing ovation in Milan Dual-tone gowns of pink and red ruled the Emmys carpet Yes, there is an art to the perfectly peeled egg Liz Weston: Is premium economy airfare worth the money? View All Promotions promotion spotlight AP What time period do you belong in? promotion spotlight Which season are you?