"Bubble wrap popping prompted Kirtland Air Force Base lock down"

From: KRQE

According to officials, the Kirtland Air Force Base precautionary lock down was caused by a person popping industrial bubble wrap.

At 3:15 Wednesday afternoon, the base went on lock down on the west side of the base after receiving reports of an unconfirmed active shooter.

The lock down was lifted later that afternoon.

http://krqe.com/blog/2015/12/03/bubble-wrap-popping-prompted-kirtland-air-force-base-lock-down/