PART 1 OF 2 - Yosemite is a National Park stretching over nearly 1,200 square miles of rugged terrain in northern California. Each year the park draws millions of tourists from all over the world, who visit to take in the soaring granite cliffs, the mountain meadows and thick sequoia forest. But in 1999, tragedy struck one of America’s natural wonders after it became apparent that a serial rapist-murderer was on the loose