Crossword clues for U.S. ballistic missile 4 letters:THORU.S. ballistic missileTHORFirst U.S. ballistic missileAEGISMythologically-named U.S. ballistic missile defense systemTRIDENTSub-launched U.S. ballistic missileTRIDENTU.S. ballistic missileREDSTONEU.S. ballistic missile