<P> The next day, Senator Lerman unexpectedly wakes up Moss and Milford, who--much to their shock over both of them in the same room--to prepare themselves and the seniors for their meeting with the President . However, when they open the room, they do not find them there but only a tied - up Steve Nisser . Moss and Milford find the missing students, as they are informed of Lerman's plot as Lerman baffles to the discovery . The senator subsequently kidnaps Miosky and takes him to the White House with the others in hot pursuit . When they arrive at the White House, the senator insults the seniors, but Moss unexpectedly stands up for them . The senator's plot is ultimately exposed and the seniors return home . The film ends with a montage of the characters and where they ended up after the events . </P> <Ul> <Li> Matt Frewer as Principal Todd Moss </Li> <Li> Valerie Mahaffey as Miss Tracy Milford </Li> <Li> Lawrence Dane as Senator John Lerman </Li> <Li> Tommy Chong as Red </Li> <Li> Jeremy Renner as Mark "Dags" D'Agostino </Li> <Li> Rob Moore as Reggie Barry </Li> <Li> Eric "Sparky" Edwards as Miosky </Li> <Li> Kevin McDonald as Travis Lindsey </Li> <Li> Michael Blake as Herbert Jones </Li> <Li> Tara Charendoff as Carla Morgan </Li> <Li> Nicole DeBoer as Meg Smith </Li> <Li> Sergio Di Zio as Steve Nisser </Li> <Li> Fiona Loewi as Lisa Perkins </Li> <Li> Kathryn Rose as Wanda Baker </Li> <Li> Danny Smith as Barry "Virus" Kemmer </Li> <Li> Kay Tremblay as Mrs. Winston </Li> <Li> Wayne Robson as Frank Hardin </Li> <Li> George R. Robertson as President Davis </Li> <Li> Rachel Wilson as Teen Girl (Susie) </Li> </Ul> <Li> Matt Frewer as Principal Todd Moss </Li> <Li> Valerie Mahaffey as Miss Tracy Milford </Li>

Where was national lampoon's senior trip filmed