Police officers investigate the southwest corner of Louis Armstrong Stadium after a drone flew over the court, buzzing the players during a match between Flavia Pennetta, of Italy, and Monica Niculescu, of Romania, during the second round of the U.S. Open tennis tournament in New York, Thursday, Sept. 3, 2015. The drone crash-landed in the seats and can be seen to the right of the police officer on his phone. (AP Photo/Kathy Willens)
