You shouldn't have even bothered to post this. People love a good reason to flame other on the internet, there's no better reason to light the fires than in the name of safety. Anyone who has ever looked at a brake post should know that, maybe search next time time and read the other flames, before dousing your self with gasoline.
Anyways at 700 miles in 14 hours it's you averaged 50mph. In the rain and snow, with no brakes.... That's pretty dangerous, but considering you're in NORTH DAKOTA in bad weather and not New Jersey, I doubt you had many other cars to avoid eating. In order to kill 20 people you first have to find the other 20 people in the state.
There's only a few things that could cause the brakes to go to the floor. Bad line, bad master, or bad wheel cylinder, all 3 relating to the common problem of no fluid or air in the lines. If you had a bad airpack generally you would have a hard pedal with no brake, or a normal pedal, with difficulty stopping due to no boost.