<p>The National Transportation Safety Board is investigating</a> the crash of a blimp flying over the US Open golf tournament in Erin, Wisconsin, on Thursday, June 15.</p><p>The blimp’s pilot was with the aircraft as it fell to earth and was taken to the hospital with burns</a>. The blimp caught fire as it slowly sank, landing in a field off the golf course. Credit: Twitter/Nicholas Hollenbeck via Storyful</p><br />