Congress Renews Ban on Undetectable Guns

3D-printed guns have some lawmakers worried

Congress approved an extension of a 25-year-old gun safety law on Monday, hours before it was slated to expire at midnight.

The Senate adopted a House-passed 10-year extension of the Undetectable Firearms Act (UFA), sending the law to President Barack Obama's desk. The legislation is the most prominent gun-related bill to clear Congress this year, as efforts to expand background checks failed in the Senate this spring.