Meanwhile, the 40th Infantry Division (doubled to 4,000 troops) of the California Army National Guard continued to move into the city in Humvees; eventually 10,000 Army National Guard troops were activated. That same day, 1,000 federal tactical officers from different agencies across California were dispatched to L.A. to protect federal facilities and assist local police. This was the first federal law enforcement response to a civil disorder in any U.S. city since the Ole Miss riot of 1962. Later that evening, Bush addressed the country, denouncing "random terror and lawlessness". He summarized his discussions with Mayor Bradley and Governor Wilson, and outlined the federal assistance he was making available to local authorities. Citing the "urgent need to restore order", he warned that the "brutality of a mob" would not be tolerated, and he would "use whatever force is necessary". He referred to the Rodney King case, describing talking to his own grandchildren and noting the actions of "good and decent policemen" as well as civil rights leaders. He said he had directed the Justice Department to investigate the King case, and that "grand jury action is underway today", and justice would prevail. The Post Office announced that it was unsafe for their couriers to deliver mail. The public were instructed to pick up their mail at the main Post Office. The lines were approximately 40 blocks long, and the California National Guard were diverted to that location to ensure peace.