Arati Prabhakar at Cyber Grand Challenge DARPA Director Arati Prabhakar speaks during the award ceremony after the world’s first all-machine hacking tournament Aug. 4, 2016, in Las Vegas. Seven teams competed in the capture-the-flag event and three of them won cash prizes. DoD photo by Cheryl Pellerin SHARE IMAGE: Download Image: Full Size (1.26 MB) Tags: DARPA, Arati Prabhakar, Cyber Grand Challenge Photo By: Cheryl Pellerin VIRIN: 160805-D-AP588-002.JPG Photo Gallery