Article Photos: FAA to allow more air tours at Grand Canyon 1/5

In this Oct. 11, 2013 photo, a tour helicopter takes off at Grand Canyon National Park Airport in Tusayan, Ariz. Air tour operators that use aircraft with quiet technology will be able to fly more people over the Grand Canyon. The Federal Aviation Administration said it plans to release 1,721 flight allocations this year that had been abandoned to those commercial tour operators, as long as their active fleet doesn't increase noise in the park overall. (AP Photo/Ross D. Franklin)