In his State of the City address on Tuesday, Mayor Ron Nirenberg said he's now focused on implementation of existing city plans and proposals. Nirenberg spoke to an audience of more than 500 at the Henry B. Gonzales Convention Center. He mentioned the expansion at the airport, mass transit plans, the new $150 million housing bond, and the Ready to Work program. Nirenberg is running for his fourth and final term in the May 6th election.