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The Navy's new Invincible class (CVN-21) carrier, Gerald R. Ford (CVN-78) is estimated to cost $5.6 billion to design and $8.1 billion to construct. The Navy plans constructing two more of these "units". CVN 79 is scheduled for commission in 2018 and CVN-80 is scheduled to enter service several years after that. The Navy has twelve Nimitz class (nuclear powered) carriers now in active service.
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The American Society of Civil Engineers estimates that repair all of the 75,000 bridges in the U.S rated structurally deficient would require $9.4 billion per year for the next 20 years.