driver did try to stop. also the railroad crossing signals and lights were working at the time of the crash. they are hesitant to give a cause. >> we'll not be derning the probable cause of the accident bhil on scene, nor will we speculate about what may have caused the accident. >> officials say it might take a year to figure out the reason behind the crash. in just two hours it could be new york city ease biggest gay pride parade ever. organizers say a record 3 million people could line the parade route. nbc's peter alexander joins me live. there will be some party just a few feet from where we are. >> this will be big. this year it could swell to 2.5 million. the celebrations are expected to last well through the weekend. the parade route ends outside the stonewall inn in the