and good morning, welcome to a special edition of today on this tuesday morning as we cover a story still unfolding at this hour. i m savannah guthrie. matt lauer is in boston this morning in what is obviously an emotional and terrible day to you. it s a sad and surreal tuesday morning, it s sunny just like it was yesterday for the running of the marathon but this city has now been changed. i m at the corner of boylston and arlington street, i have been to the finish of this race on a number of occasions. it was packed with people standing side by side looking to see if they could spot some loved ones and friends crossing the finish line when the bombs went off. the boston globe have a headline that says marathon terror. we can tell you overnight we know some developments took place. police went to revere, massachusetts, that s about ten miles from here to the north, it s a suburb and they served a search warrant at an apartment there, they interviewed two men this mo