US airport security overhaul after secret tests reveal lapses

A top US official has pledged reforms after tests found that airport screeners allowed mock explosives and weapons through security checkpoints 95% of the time.

Homeland Security Secretary Jeh Johnson has called for revised security procedures in airports across the US.

In one test, a screener failed to find a fake bomb taped to an agent's back despite patting the man down.

Karen Travers reports for ABC News in Washington.