17. An Avalanche Charge
Back in 2014, the TSA confiscated this homemade explosive that was going to be used to create an avalanche. It was found in at Anchorage’s Tom Stevens International Airport in a carry-on and the TSA reported the item to the FBI. The passenger was an oil worker and mountaineer, so maybe he wasn’t going to actually detonate the device in the plane, plus the airport police found no triggering mechanism. However, the man was arrested.