Former U.S. Senator Tom Harkin, one of the main authors of the landmark 1990 Americans With Disabilities Act, will deliver a public address at 6:30 p.m. on Oct. 20 at the University of Florida’s Grand Ballroom of the Reitz Union.  The event is free and open to the public and will be streamed live on the Bob Graham Center website at www.bobgrahamcenter.ufl.edu.