After seeing yesterday's crash of a Southwest Airlines 737, I think it's time for the FAA to step in and require airports in residential areas to install arrestor systems on their runways. This should also be the case for airports like LaGuardia and Kennedy that are partially surrounded by water. Chicago-Midway Airport is completely surrounded by dense urban neighborhoods, and has very short runways designed for turboprop aircraft. The most practical arrestor system is a substrate made of cellular cement that sits on the end of a runway. It has proven effective in stopping a jet going as fast as 85mph. The EMAS system proved it's reliability when it successfully stopped a Polar Air 747 in January at JFK from careening off the runway. Their was minimal damage to the a/c and no injuries in the incident. Yesterday could have been much worse and I'd like to see the FAA do something worthwhile about this problem. Here is some more info on the system.