Adam Lanza's hard drive, which was found destroyed in his Connecticut home, may be beyond repair police say, leaving them at a loss to explain the shooter's motive. When police first discovered the tainted hard drive, they believed that it could serve as a key piece of evidence in discovering why a 20-year-old man would terrorize an elementary school filled with children. It appears, however, that the shooter did not want his motive unveiled. "The computer's hard drive appeared to have been badly damaged with a hammer or screw driver," law enforcement authorities told ABC News on Monday. Two other...