Booms

So far it's completely unexplained. What caused a mysterious boom that was heard by many over northeast Missouri Tuesday morning? Let's explore some theories.

Do you believe in conspiracies?  I used to go on camp outs when I was a Boy Scout simply because I was determined to catch "Mo-Mo" (Missouri version of  Bigfoot...basically Bigfoot wearing flip-flops)  So, yes, I tend to get caught up in conspiracies fairly often.  That's why I'd like to know what caused the huge boom that rattled the Hannibal/Quincy area late this morning.