USA: New Anti-aircraft guns strenghten U.S. defence.
SLATE INFORMATION - HOLD THAT ONE! American anti-aircraft gunners in demonstration of rapid-fire and 'remote control' weapons against 1 1/2 mile-high towed target
Military officer holding shells / Soldiers demonstrating rapid-fire anti-aircraft gun / Line of rapid-fire anti-aircraft guns being operated / AV clouds / More of line of rapid-fire anti-aircraft guns being operated
SLATE - A direct hit and the target they brought down (unclear)
AV Clouds / Wide anti-aircraft gun
Background: USA: New Anti-aircraft guns strenghten U.S. defence.