Navy Analyzes Missile Tube Welding Fixes, Carves New Path for Columbia-Class Sub The US Navy is charting a new course for its emerging nuclear armed Columbia-Class ballistic missile submarines Kris Osborn · November 20, 2018 Please leave this field emptyStay Updated with Warrior Maven Subscribe for daily military news and updates delivered straight to your inbox. We don’t spam! Read our privacy policy for more info. Check your inbox or spam folder to confirm your subscription.