shanksville, pennsylvania. he will lay a wreath there. the flight 93 national memorial opens this weekend. later in the day he will come down to the pentagon for another ceremony there. and then sunday night the concert of hope. it was going to be taking place at the washington national cathedral. they had a construction mishap that will now take place at the kepd center tomorrow. dr. biden and his wife dr. jill biden will attend that as well and the bidens today for the service that is open in commemorating that national flight 93 national memorial in shanksville, p pennsylvania, commemorating the heroes that saved countless lives here in washington. maybe many the white house, maybe in the capital. perhaps in the capital according to the 9/11 commission report earlier today president obama in his weekly address spoke about the upcoming commemoration. >> a decade after 9/11 it's clear for all the world to see the terrorists who attacked us that september morning are no match for the character of our people, the resilience of our nation or the endurance of our