CHICOPEE — A newly rebuilt runway at Westover Air Reserve Base is being called key to keeping the base in Chicopee and helping the 439th Airlift Wing do its job.Base commander Col. Joseph Janik and other Westover personnel joined with Gov. Charlie Baker, U.S. Rep. Richard E. Neal, Chicopee Mayor John L. Vieau and others to celebrate the reconstruction of the main runway Tuesday morning.