that transforest fir transformar stone.oncorner stone we secure the roadways. >> they require a robust security detail. in june grand park was the site of a massive rally celebrating the chicago blackhawks stanley cup victory. 200,000 people attended under the close eye of law enforcement. still marathon organizers have tightened security measures. people will not be able to pick up bibs for others. and these bags are the only thing permitted in the park on race day. as in years' pass four security check points will give runners access. spectators won't have access to the start and finish lines. in addition to the tens of thousands of security cameras around the city. extra mobile cameras will monitor the race. >> post boston we'll do our job so everyone can have fun. as a group and the country we come together. >> the second largest marathon in the world and the first major marathon since boston. >>> in oil rich north dakota people are learning about a pipe line leak days after it happened. a wheat farmer first found the l