ARLINGTON - A month ago, Michael Tedford was patrolling a military camp near the embattled city of Fallujah. This week, he returned to the front of his classroom at Jones Elementary School in the Mansfield school district. On Tuesday, school officials held a surprise welcome ceremony where he raised the flag and led the students in the Pledge of Allegiance. "We have one of our teachers back. We have one of our heroes," Principal Karl Bethel said. Tedford, a fourth-grade teacher and member of the National Guard, was in Iraq for nearly a year, mostly near Baghdad and Fallujah. He...