The tornado that destroyed Moore, Okla., is likely to rank among these costliest twisters.
The deadly tornado that destroyed parts of Moore, Okla., will likely be among the costliest twisters in U.S. history. Here are the 10 most expensive tornadoes since 1950:
Social Security Administration
The first Social Security check is issued, America launches its first satellite into orbit, McDonald's comes to Moscow, and "Avatar" hits the $2 billion mark, all on this day.
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