April 2015
Beginner
480 pages
107h 32m
English
A press operator at the Denver Mint noticed a flaw—an extra up leaf or an extra down leaf—on Wisconsin state quarters being pressed at one of his five press machines. He stopped the machine and left for a meal break. When he returned, he saw the machine running and assumed that someone had changed the die in the machine. However, after a routine inspection, the machine operator realized the die had not been changed. The faulty press had likely been running for over an hour and thousands of the flawed coins were now commingled with unblemished quarters. As many as 50,000 of the faulty coins entered circulation, setting off a coin collector buying frenzy.3
Northrop Grumman has implemented several major changes in its satellite ...