Obviously you have to have an idea of the consequences of failure. In the U.S. 20 years ago, if you missed a flight and there was another one going out that da

Obviously you have to have an idea of the consequences of failure. In the U.S. 20 years ago, if you missed a flight and there was another one going out that day, they'd just put you on that one. These days, most airlines want to charge you some very hefty fee if you miss your flight.