The incoming senior class at Iowa Mennonite School will be heading to D.C. tomorrow.Principal at IMS Tony Miller, says that traditionally the senior trip to the capitol was held at the end of the school year, but got too busy with sports. He adds he’s seen a positive response from students regarding the change. The 21 seniors will tour the Smithsonian and the Capitol among other things. The group leaves by charter bus tomorrow at noon and will be returning next Wednesday.