This week marks the 40th anniversary of a federal law that requires equal opportunities for both boys and girls in school programs.

Title IX makes no mention of sports, but the law has opened a door for many women athletes. Kathrine Switzer's story is an example of how far women athletes have come these past 40 years.

"In 1967 I had trained for the Boston marathon and my coach, he really inspired me," said the veteran athlete. ...

Switzer entered the race under her initials. Her coach picked up her official number. And there was utter shock when she appeared in the field of men.

"The race director who saw this whole thing lost his temper and chased me down the street attacked me ...."