Police pitch extra vigilance at Derby events

Louisville police say security plans are being reviewed for the events leading up to the Kentucky Derby and are in contact with the FBI about the ongoing investigation into the bombings at the Boston Marathon.
Police Lt. Col. Kenton Buckner says more than 1,000 officers will be on hand for Thunder Over Louisville, the air show and fireworks display along the Ohio River. The show kicks off two weeks of festivities before the May 4 Run to the Roses at Churchill Downs.
Police Chief Steve Conrad says the public should be extra vigilant at the events.
The two explosions about 10 seconds and around 100 yards apart Monday near the end of the 26.2-mile race, tearing off limbs and leaving the streets stained with blood and strewn with broken glass.

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