Joanne K Schack (born 1952)

In 1952, in the year that Joanne K Schack was born, on July 2, Dr. Jonas E. Salk tested the first dead-virus polio vaccine on 43 children. The worst epidemic of polio had broken out that year - in the U.S. there were 58,000 cases reported. Of these, 3,145 people had died and 21,269 were left with mild to disabling paralysis.

In 1967, on November 7th, President Johnson signed legislation passed by Congress that created the Corporation for Public Broadcasting (CPB), which would later become PBS and NPR. The legislation required CPB to operate with a "strict adherence to objectivity and balance in all programs or series of programs of a controversial nature".

In 1977, on January 21st, President Carter pardoned "draft dodgers" - men who avoided the draft during the Vietnam War. He fulfilled a campaign promise with the pardon. But it only applied to civilian evaders - the estimated 500,000 to 1 million active-duty personnel who went AWOL were not included.

In 1989, on March 24th, the Exxon Valdez, an oil tanker, struck a reef in Alaska's Prince William Sound and oil began spilling out of the hold. The oil would eventually contaminate more than a thousand miles of coastline. It is estimated that over 10.8 million gallons of crude oil spilled into the Sound - killing 100,000 to 250,000 seabirds, over 2,800 sea otters, about 12 river otters, 300 harbor seals, 247 bald eagles, and 22 orcas - as well as an unknown number of salmon and herring.

In 1993, on January 20th, William J. Clinton became the 42nd President of the United States. He beat incumbent George H.W. Bush who was seeking his second term. Clinton won 43.01% of the popular vote to Bush's 37.45%. An independent candidate, Ross Perot, won 18.91% - the most votes for an independent candidate since Teddy Roosevelt's run for President in 1912.