While there remains some debate over who, precisely, was at fault over last week's nastiness relating to American's fleet of MD-80's (the FAA, the airline itself, etc.), one thing is for sure: it doesn't bode well. If a few wires can suddenly bring the largest airlines in the world to a screeching halt, what other disasters await us this summer,and beyond? Will it be United's turn to face some technological or administrative snafu? How will the looming recession, skyrocketing fuel costs, and a generally decrepit and overloaded air traffic control system impact your ability to travel—and do it safely?