Several Democrats worry the Pentagon isn't taking its review of the Sentinel nuclear missile program seriously following a critical cost breach in the program, according to a letter sent to Defense Secretary Lloyd Austin today. The co-chairs of the Congressional Nuclear Weapons and Arms Control Working Group -- Reps. John Garamendi (CA) and Don Beyer (VA) and Sens. Edward Markey (MA) and Jeff Merkley (OR) -- wrote they believe the Defense Department may not be conducting a “comprehensive, thorough and...