A year after the Capitol riot, work remains to prevent another attack

The Jan. 6 attack on the U.S. Capitol led to a transformation of security for the citadel of democracy and members of Congress. One year later, a new team of Capitol security leaders is in place, and a series of congressional committees is still investigating what went wrong that day.

But many say plenty of work remains to ensure that another Jan. 6 never happens again.

"My biggest concern is getting our staffing up," said Capitol Police Chief Tom Manger, who came on board in July. "But in terms of...