Students at The University of Texas at Dallas are using artificial intelligence to stop mass shootings before they start. "It's something that we haven't had before," said Ashlesha Nesarikar, a UT Dallas computer science major. The early-warning system the 19-year-old and her team developed is called iNotify -- it instantly analyzes security camera video to identify weapons and real threats. "We can add this extra level of context to, in real time, recognize whether someone is wielding a weapon and posing a threat to people in the community," Nesarikar said. The successful test flight from Virgin Galactic's spaceship, the VSS Unity, could be the first step for tourists wanting to take a quick trip to space.