Predator one

"On opening day of the new baseball season, a small model-kit airplane flies down from the stands and buzzes the mound, where a decorated veteran pilot is about to throw out the first ball. The toy plane is an exact replica of the one flown by the war hero. Everyone laughs, thinking it a good prank or a publicity stunt. Until it explodes, killing dozens. Seconds later a swarm of killer drones descend upon the panicked crowd, each one carrying a powerful bomb. Halfway across the country a swarm of much larger drones slams into the Golden Gate Bridge, destroying one of the nation's landmarks.…