Eric Walker added The Future of the Submarine - Emerging Threats, Sensors & Transparent Oceans - YouTube to Columbia-class submarine

Eric Walker added "Boomers" to Nuclear-powered ballistic missile submarines

Eric Walker placed Nuclear-powered ballistic missile submarines under Nuclear triad

Eric Walker added The Future of the Submarine - Emerging Threats, Sensors & Transparent Oceans - YouTube to Nuclear triad

Eric Walker added The Future of the Submarine - Emerging Threats, Sensors & Transparent Oceans - YouTube to Nuclear-powered ballistic missile submarines

Eric Walker added "SSBN-X Future Follow-on Submarine" to Columbia-class submarine

Eric Walker added "Ohio Replacement Submarine" to Columbia-class submarine

Eric Walker updated the time prefix for Ohio-class submarine to be "1976"

Eric Walker updated the time prefix for Ohio-class submarine to be "2024"

Eric Walker added Ohio-class submarine to Nuclear-powered ballistic missile submarines

Eric Walker updated the time prefix for Columbia-class submarine to be "2020"

Eric Walker updated the time prefix for Columbia-class submarine to be "2024"

Eric Walker added Columbia-class submarine to Nuclear-powered ballistic missile submarines

Eric Walker placed Nuclear-powered ballistic missile submarines under Nuclear submarines

Eric Walker added Nuclear-powered ballistic missile submarines to Ballistic missile submarines