San Francisco Celebrates 4th Of July

SAN FRANCISCO, CA - JULY 4: Photographers wait for the July 4th celebratory fireworks over the San Francisco Bay on July 4, 2011 in San Francisco, California. The United States celebrated its 235th anniversary of declaring independence from the British Empire. (Photo by David Paul Morris/Getty Images)

San Francisco Celebrates 4th Of July

SAN FRANCISCO, CA - JULY 4: The July 4th celebratory fireworks explode over San Francisco Bay with San Francisco in the background on July 4, 2011 in San Francisco, California. The United States celebrated its 235th anniversary of declaring independence from the British Empire. (Photo by David Paul Morris/Getty Images)

San Francisco Celebrates 4th Of July

SAN FRANCISCO, CA - JULY 4: The July 4th celebratory fireworks explode over the San Francisco Bay with San Francisco in the background on July 4, 2011 in San Francisco, California. The United States celebrated its 235th anniversary of declaring independence from the British Empire. (Photo by David Paul Morris/Getty Images)

San Francisco Celebrates 4th Of July

SAN FRANCISCO, CA - JULY 4: The July 4th celebratory fireworks explode over the San Francisco Bay with San Francisco in the background on July 4, 2011 in San Francisco, California. The United States celebrated its 235th anniversary of declaring independence from the British Empire. (Photo by David Paul Morris/Getty Images)

San Francisco Celebrates 4th Of July

SAN FRANCISCO, CA - JULY 4: The July 4th celebratory fireworks explode over the San Francisco Bay with San Francisco in the background on July 4, 2011 in San Francisco, California. The United States celebrated its 235th anniversary of declaring independence from the British Empire. (Photo by David Paul Morris/Getty Images)

San Francisco Celebrates 4th Of July

SAN FRANCISCO, CA - JULY 4: The July 4th celebratory fireworks explode over the San Francisco Bay with San Francisco in the background on July 4, 2011 in San Francisco, California. The United States celebrated its 235th anniversary of declaring independence from the British Empire. (Photo by David Paul Morris/Getty Images)

San Francisco Celebrates 4th Of July

SAN FRANCISCO, CA - JULY 4: The July 4th celebratory fireworks explode over the San Francisco Bay with San Francisco in the background on July 4, 2011 in San Francisco, California. The United States celebrated its 235th anniversary of declaring independence from the British Empire. (Photo by David Paul Morris/Getty Images)

San Francisco Celebrates 4th Of July

SAN FRANCISCO, CA - JULY 4: The July 4th celebratory fireworks explode over the San Francisco Bay with San Francisco in the background on July 4, 2011 in San Francisco, California. The United States celebrated its 235th anniversary of declaring independence from the British Empire. (Photo by David Paul Morris/Getty Images)