. >> michael shawn ung. >> my sister kathleen casey. sister in life, sister forever. i love you forever, kathleen, and i miss you. [ bells ringing ] >> reporter: in pennsylvania, a crowd gathered in the field where it is about to get under way to honor the passengers and crew of united flight 93. and at the white house they remember victims in silence. president obama laid wreaths and remembered those lost at the pentagon. they held a remembrance ceremony outside the white house. the crowd was small but the message was a big one. james hash had more. >> i would like to thank you for coming and being with us and honoring the victims and families of 9/11. >> in lafayette park, just steps from the white house, where today the flag flies at half staff in remembrance, she had a simple message. >> each one of us must take steps towards peace and friendship. and it can happen. >> the waves of fear, suspicion and mistrust that swept the country after the attacks of 9/11 left many american muslims feeling isolated and suspects, despite condemning the attacks. >> the problem wa