In this photo taken June 9, 2011 in Lake Alfred, Fla., a remote control helicopter fitted with a special camera flies toward an orange crop. The device allows researchers to take photos of crops from the air and detect disease or other problems. (AP Photo/Tamara Lush)

Associated Press
In this photo taken June 9, 2011 in Lake Alfred, Fla., a remote control helicopter fitted with a special camera flies toward an orange crop. The device allows researchers to take photos of crops from the air and detect disease or other problems. (AP Photo/Tamara Lush)
In this photo taken June 9, 2011 in Lake Alfred, Fla., a remote control helicopter fitted with a special camera flies toward an orange crop. The device allows researchers to take photos of crops from the air and detect disease or other problems. (AP Photo/Tamara Lush)
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