At least Bush will make sure that he will be safe. I guess no one will be close enough to throw eggs at the limo, a la F9/11. Unmatched Security Planned for Inaugural (WP):
As tens of thousands of people come to Washington to watch the Jan. 20 swearing in, the city will be filled with military personnel, FBI agents in full SWAT outfitting, snipers on rooftops and scores of bomb-detecting dogs. The region’s air defenses have been strengthened to prevent intruder aircraft, and sensors will be deployed throughout the area to detect biological, chemical or radiological material.
About 2,000 out-of-town officers will help with security and traffic details. Undercover officers will work the crowds, and D.C. police officers will be posted every six to eight feet along the parade route.
Plans call for sturdier barriers and more checkpoints and metal detectors along the parade route than in previous years. Officials also are setting up a higher-security ticketing and credentialing system for some events, to prevent people from using counterfeit materials to get into the balls and more restricted areas.