jaclyn donovan. >> nearly 3,000 victims of september 11th attacks were remembered one by one. >> whenever you wore a ridiculous shirt such as the one i'm sporting, we didn't whether to laugh or cry. today, we will do both. >> my father, walter a matusa, junior. we miss you >> phillip haze has been to all 15 ceremonies. >> when they clang for the bell the time my dad lost his life. that exact moment was the most touching >> remember those lost at the pentagon, president obama hailed the sacrifice of the fallen and the rye zillion of those left behind. >> we come together in prayer and gratitude for the strength that has fortified us across these 15 years >> flight 93 crashed in shanksville, an honor guard placed a wreath at the memorial honoring the 40 passengers and crew. day of working to move forward while vowing not to forget. >> the city of philadelphia honored those who perished on 9/11 during a special ceremony in old city. a promotion from the firemen's hall museum from the betsy ross house. that's where a bell ringing ceremony was held to remember the 403 new york city firefighter