What makes the 1993 US penny special?

What are all 19 free states during the Civil War in the US? Why do some dollar bills have red ink? What event lead up to the Lewis and Clark expedition? A document granting permission to start a colony? What is an American from the southern state called? What did women do in New Orleans in the 1940s? How did the US become more democratic between the 1790s and the 1830s? What document listed rules for the 13 colonies? What does theta mean in greek? Why did the selective service act mean for American men? What happened in the years 1861 - 1865? Who warned the us about the zimmerman telegram? How many people in the Union army in the civil war? Who were the women that have been on the US coins? Industrialists formed trusts to promote competition? How did Charles Lindbergh effect the American society? Articles of Confederation- monitor of postal system? What accurately describes the effect of the Thirteenth Fourteenth and Fifteenth amendments on the lives of southerners? What is the value of a 1945 US cent? How tall is Terri Clark?