president's national security advisor jake sullivan. as you know, tomorrow morning the president will travel to boston to speak at an interfaith service dedicated to those gravely wounded or killed in monday's bombing. i have a scheduling update for you on that. the first lady will be joining the president on the trip to boston. with that i will take your questions. >> obviously the public is already pretty nervous given the situation in boston. has the fbi told the white house about anything whether the letters that have been received are related to the boston incident? >> i would point you to the statement that the fbi put out. it is my understanding that they have not made that connection. but i would refer you to the fbi for that. >> do you know if they're not making that connection or if they've ruled out the connection? >> i would refer you to the fbi. >> so at this point there's nothing you can say to the public to reassure them? >> well, i can tell you in line as you know for a long time now there have been long established procedures and protocols. any time a suspicious powder is located in a mail facility, it