Rain and Explosions Cause Delays for Daytona 500 [VIDEO]
Matt Kenseth took the checkered flag at the 2012 Daytona 500.  The 39-year-old drove the number-17 car to victory lane in a green-white-checkered finish for his second career win at the "Great American Race."
Kenseth was also the champion in 2009.  He is the first repeat champion since Jeff…