A knife was found onboard a SkyWest-Midwest Airlines flight from Minneapolis to Milwaukee Thursday. The Transportation Security Administrations (TSA) confirms that an Exacto-style knife was found onboard the plane Thursday morning. When the knife was found, the plane was returned to the gate at Minneapolis-St. Paul International Airport where passengers were taken off the plane and re-screened while the airplane was searched. No other contraband was found and all passengers were allowed to re-board. Midwest Airlines Flight YX2502 arrived in Milwaukee at 11:43 a.m, -- about one hour behind schedule.