More than 200,000 people crossed the bridge the day it opened in 1937. Many walked. Others ran, tap-danced, roller-skated, unicycled, or strode on stilts. Courtesy of GoldenGateBridge.org hide caption

PayPal co-founder Peter Thiel, who has donated more than $2.5 million to a superPAC backing GOP presidential candidate Ron Paul, speaks at the National Press Club in Washington, D.C., in October. Chip Somodevilla/Getty Images hide caption

President Obama speaks during a campaign fundraiser Monday at the Rubin Museum of Art in New York City. The event, co-hosted by gay- and lesbian-rights leaders and a Latino nonprofit, featured singer Ricky Martin. Mandel Ngan/AFP/Getty Images hide caption

Oakland Mayor Jean Quan and Oakland Police Chief Howard Jordan address reporters after a gunman allegedly killed seven people at a California religious college. The suspect, identified as One Goh, is a 43-year-old Korean who has been living in the United States. Kimihiro Hoshino/AFP/Getty Images hide caption

The beleaguered city of Stockton is fighting to avert bankruptcy by cutting staff, including a quarter of the roughly 425-member police force. David Paul Morris/Bloomberg hide caption

San Joaquin sheriff detectives sift for human remains that were excavated from an abandoned ranch near Linden, Calif., on Sunday. Authorities say Wesley Shermantine and Loren Herzog wantonly murdered an unknown number of victims before their arrest in 1999. Now, one of the convicted killers is leading investigators to burial sites that have yielded hundreds of bones. Craig Sanders/AP hide caption

A new TV ad recently test-launched by the AFL-CIO discusses work, but never mentions unions specifically. Courtesy of the AFL-CIO hide caption

James Witt stands next to the foundation of a house he is building in Palo Alto. Witt has built a successful business by tearing down and rebuilding houses in Silicon Valley. Cindy Carpien/NPR hide caption