A view of the Three Mile Island power plant near Harrisburg, Pa., site of the worst nuclear accident in U.S. history. In 1979, a reactor at the plant experienced a partial meltdown, but radioactive material never escaped containment. Bradley Bower/AP Photo hide caption

itoggle caption Bradley Bower/AP Photo

Zimbabwean President Robert Mugabe stands at his 2008 inauguration ceremony at the statehouse in Harare. Tsvangirayi Mukwazhi /AP hide caption

itoggle caption Tsvangirayi Mukwazhi /AP

In 1992, 28,800 rubber ducks were lost at sea. What happened to them is the subject of Donovan Hohn's book Moby-Duck. Jose Gil/iStockphoto.com hide caption

itoggle caption Jose Gil/iStockphoto.com