He and another researcher at the Fox Chase Cancer Center in Philadelphia,Irving Millman, invented the vaccine in nineteen sixty-nine.

VOA: special.2011.05.25

In the late seventeen hundreds, many events that took place in Philadelphia gave birth to the American Revolution and independence.

VOA: special.2010.04.04

The Rosenbach Library in Philadelphia, Pennsylvania has a collection of more than ten thousand drawings by Maurice Sendak.

VOA: special.2009.10.05

When Gardot was nineteen, a large car ran into her while she was riding her bicycle in Philadelphia,Pennsylvania.

VOA: special.2009.10.30

Some of Philadelphia's other nicknames are The Quaker City, The Cradle of Liberty and The Birthplace of America.

VOA: special.2010.04.04

President Obama threw out the first pitch as the Washington Nationals opened their season against the Philadelphia Phillies.

VOA: special.2010.04.10

On July fourth, seventeen seventy-six, colonists meeting in Philadelphia,Pennsylvania, approved the Declaration of Independence from Great Britain.

VOA: special.2011.07.08

As a child,there was her father. Later there was her father's law partner, and a churchman she met in the city of Philadelphia.

VOA: special.2010.07.18

By eighteen seventy-six he was ready to present Hires Root Beer at the Philadelphia Centennial Exhibition.

VOA: special.2011.08.01

That name could also describe a dessert served at Buddakan, a modern-Asian restaurant in Philadelphia,Pennsylvania.

VOA: special.2010.04.12

Philadelphia was the temporary capital of the new nation from seventeen ninety to eighteen hundred.

VOA: special.2010.04.04

This is Brook Levin, a retired teacher who ordered the dessert at Buddakan in Philadelphia.

VOA: special.2010.04.12

The Philadelphia exhibition also included Alexander Graham Bell's telephone, Heinz ketchup and the Remington typewriter.

VOA: special.2011.08.01

President William Howard Taft began the tradition, also in a game between Washington and Philadelphia.

VOA: special.2010.04.10

He established a city and named it Philadelphia, which is Greek for "brotherly love."

VOA: special.2010.04.04

New Jersey is between the big cities of New York, New York and Philadelphia,Pennsylvania.

VOA: special.2009.08.16

Now,on this sad return trip, the train stopped at those same cities: Baltimore.Philadelphia.New York.

VOA: special.2010.01.07

An ancient city called Philadelphia was also noted in Christianity's holy book, the Bible.

VOA: special.2010.04.04

It was led by Lee Peterlin of Drexel University College of Medicine in Philadelphia,Pennsylvania.

VOA: special.2009.03.18

But in nineteen ten it was the Washington Senators against the Philadelphia Athletics.

VOA: special.2010.04.10

His starring part in the nineteen ninety-three movie "Philadelphia" changed his image.

VOA: special.2011.06.17

These include the Brooklyn Dodgers, the Philadelphia Phillies and the Chicago Cubs.

VOA: special.2011.04.04

Leonard studied music at Harvard University and the Curtis Institute in Philadelphia,Pennsylvania.

VOA: special.2009.08.02

He had planned to capture Harrisburg, the state capital, and then Philadelphia.

VOA: special.2009.11.05