reporter john mcdevitt from our sister radio station kyw news radio was there. >> reporter: members of the philadelphia police and fire pipes and drums led a patriotic procession to the betsy ross house where a ceremony to remember those who lost their lives in 9/11 was held. >> our country suffered an incredible tragedy which shocked all of us to our core. the day will, of course, forever stand out in our minds. loved ones and friends and others we did not know who lost their lives will remain forever in our hearts and in our souls. >> reporter: fire commissioner derek sawyer knew a new york firefighter who died on nine help. he asked people to stand up and say the names of a person they knew. >> we always say we never forget. if we don't bring them back up we'll forget. i thought that it was important for everyone to talk about that one person that they knew. >> reporter: there was a bell sounding memorial and a flag folding ceremony. members of the council rock south high school band also participated. >> it's just awesome how it -- how we took such a terrible incident and it reunit

john mcdevitt of our sister station kyw news radio shows us what is new this year. >> reporter: beforeentering the new you machine shop zone, one of six haunt add trackses in the terror behind the walls show you are greeted by some gary looking nurses, if you choose to have a more interactive experience, a red x is put on your cheek and they are given glow necklacees a sign to the people in the shop thaw give permission to be grab, chased or even taken away from your group and become part of the show. any element is a director for terror behind the walls. >> we have opened up a brand new attraction called, machine shop, this is isn't part of the prison, people have never enter. so where i'm standing in the ruins here visitors have never been back here. the visitors will enter long forgotten machine shop, that is now inn habited by a group of individuals, who are, of one mind, of many bodies. >> reporter: eastern state penitentiary has hired 200 cast members for biggest of the year, ticket information at cbs philly.com. >> eastern state penitentiary terror behind the walls has 31 shows