firefighting hampered by presence of a drone

http://www.nzherald.co.nz/world/news/article.cfm?c_id=2&objectid=11480156

"However, she said fire officials grounded the planes for about eight minutes until the drone left the area of the fire.
It was the fourth time in the last month that the spotting of a drone over a California wildfire prompted the Forest Service to ground the firefighting planes out of fear that the drones will collide with the aircraft."