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In page Rockwell B-1 Lancer:

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The U.S. Department of Defense responded by accelerating its Rapid Deployment Forces concept but suffered from major problems with airlift and sealift capability.[2] In order to slow an enemy invasion of other countries, air power was critical; however the key Iran-Afghanistan border was outside the range of the United States Navy's carrier-based attack aircraft, leaving this role to the U.S. Air Force.[citation needed]