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The last living signer of the Declaration of Independence, Charles Carroll, called this "among the most important acts of my life, second only to that of signing the Declaration of Independence, if even it be second to that."

  • Sending the first telegraph message
  • Breaking ground for America’s first passenger railway
  • Launching the first marine torpedo
  • Christening the first multi-tubular-boiler locomotive
  • Throwing the switch on the first electric printing press