Nearly five years after September 11, the airline industry is finally adopting new in-flight technologies to keep planes safe from terrorists. With $110 million in grant money from the U.S. Department of Homeland Security, the Federal Aviation Administration is currently in the process of certifying two antimissile systems designed for commercial airliners. The technology uses infrared sensors to detect and track incoming missiles, then fires a laser beam to jam a heat-seeking missile’s infrared guidance system.