It seems like Almost Yesterday that Ken Sisler of Dexter, Mo., received our nation’s highest award for valor: the Congressional Medal of Honor. Lieutenant Sisler was born in Dexter Sept. 19, 1937, graduated from Dexter High School in 1955, attended Arkansas State University, spent five years in the Air Force, and then returned to Arkansas State where he graduated in 1964. In 1963, he won the National Collegiate Skydiving Championship while competing with his leg in a cast. In 1965, Sisler