America's nuclear bomb gets a makeover

Aired: 11/5/2015 | 0:09:09 | Clip
Greatly reduced since its Cold War heyday, some say the U.S. nuclear arsenal is overdue for an overhaul. The PBS Newshour got exclusive and unprecedented access to labs and facilities across the country to observe how the B-61 nuclear bomb is being upgraded and modernized. Jamie McIntyre, national security correspondent for Al Jazeera America, reports on special assignment for the NewsHour.