LINCOLN: A regional jet has made an emergency landing in Lincoln after crew members detected smoke in the cockpit.Lincoln Airport Director of Operations Bob McNally confirms a United Airlines jet carrying 53 passengers and three crew members reported the smoke just after takeoff from Lincoln at around 7 a.m. Monday. The plane was headed for Denver.McNally says the plane immediately turned around and landed.Crew and passengers were safely taken off the plane, and rescue crews checked the plane’s cargo section, finding nothing.McNally says maintenance crews were checking the plane to see if it could be flown to Denver later Monday, or if travelers would need to make other arrangements. – Yahoonews