Apparently that explanation is even an FAQ on the fed website: https://www.federalreserve.gov/faqs/currency_12772.htm https://www.federalreserve.gov/faqs/curren

Apparently that explanation is even an FAQ on the fed website: https://www.federalreserve.gov/faqs/currency_12772.htm https://www.federalreserve.gov/faqs/currency_12772.htm