Indy 500 security revved up for 100th running

By Steve Keating INDIANAPOLIS (Reuters) - The hundreds of thousands of spectators planning to attend Sunday's 100th running of the Indianapolis 500 should arrive early and expect to go through added layers of security, officials warned on Wednesday. With the race sold out for the first time and nearly 400,000 fans expected at the Indianapolis Motor Speedway, law enforcement agencies conceded that securing what claims to be the world's biggest single day sporting event will be a massive challenge