Salvador M. Ramirezflipped into The National USADroneShield is keeping hostile UAVs away from NASCAR eventsverified_publisherTechCrunch - Devin ColdeweyIf you were hoping to get some sweet drone footage of a NASCAR race in progress, you may find your quadcopter grounded unceremoniously by a mysterious force: DroneShield is bringing its anti-drone tech to NASCAR events at the Texas Motor Speedway. The company makes a handful of products, all aimed …