Webster City- Friday marks the 25th anniversary of the 9/11 attacks on the World Trade Center, the Pentagon and near Shanksville,Pennsylvania. Webster City will join the nation with a ceremony marking the event Friday morning at 9:00 at the Webster City Fire Station at Superior and Bank Streets. The public is invited to attend the brief ceremony. After which, a giant U.S. flag will be flown over a Webster City fire engine outside the station until sunset Friday evening. Flags at all government and business offices will be flown at half-staff during the day tomorrow to mark the event.