Increasing flight delays and cancellations have resulted from precautionary actions by the Federal Aviation Administration, or FAA, after a collision in January involving an American Airlines jet and a U.S. Army helicopter resulted in more than 60 deaths. The crash is still being investigated by the National Transportation Safety Board, while the FAA is expected to use new technology to both improve flight operations and reduce risk factors. Steve Polzin, a research professor in the School of Sustainable Engineering and the Built Environment, part of the Fulton Schools, says airport officials will need to balance new safety guidelines with the need to improve flight times. (Access to the article requires a  subscription.)