2009 San Francisco Pride

Two men ride on a motorcycle down Market Street during the 39th annual San Francisco Pride parade June 28, 2009. The 39th annual parade drew thousands of people to SF to celebrate gay, lesbian, bisexual and transgender pride. (David Paul Morris/Getty Images)

2009 San Francisco Pride

Parade participants walk down Market Street. (David Paul Morris/Getty Images)

2009 San Francisco Pride

Parade participants walk down Market Street during the 39th annual San Francisco Pride parade. (David Paul Morris/Getty Images)

2009 San Francisco Pride

Lt. Dan Choi, a graduate of West Point, was the Celebrity Grand Marshal of the 39th annual San Francisco Pride parade on June 28, 2009. (David Paul Morris/Getty Images)

2009 San Francisco Pride

Thousands of people fill Market Street during the 39th annual San Francisco Pride parade June 28, 2009 in San Francisco. (David Paul Morris/Getty Images)

2009 San Francisco Pride

"Ginger Snap" has a laugh before participating in the 2009 parade. (David Paul Morris/Getty Images)

2009 San Francisco Pride

Bill and Chris, who did not want to give their last names, walk in the 2009 San Francisco Pride parade. (David Paul Morris/Getty Images)

2009 San Francisco Pride

Christmas Leubrie watches the parade. (David Paul Morris/Getty Images)

2009 San Francisco Pride

Married in 2004 then again in 2008 to make it legal, Kathryn Mudie, (left) and Susan McDaniel of Novato share a kiss before the start of the 39th annual San Francisco Pride. (David Paul Morris/Getty Images)

2009 San Francisco Pride

Two women take their picture as they get ready to participate in the San Francisco Pride parade. (Getty Images)

2009 San Francisco Pride

Members of the Mikes on Bikes start the San Francisco Pride parade. (David Paul Morris/Getty Images)

2009 San Francisco Pride

Community grand marshals Molly McKay (left) and Davina Kotulksi ride in the San Francisco Pride parade June 28, 2009 in San Francisco. (David Paul Morris/Getty Images)

2009 San Francisco Pride

A participant takes part during the 2009 San Francisco Pride pride parade. (David Paul Morris/Getty Images)

2009 San Francisco Pride

A participant takes part during the 39th annual San Francisco Pride parade. (David Paul Morris/Getty Images)

2010 San Francisco Pride

A dancer performs for the crowds along Market Street during the annual San Francisco Pride parade on Sunday, June 27, 2010 in San Francisco. (AP)

2010 San Francisco Pride

A reveler poses along Market Street during the 40th annual San Francisco Pride parade on June 27, 2010. (AP)

2010 San Francisco Pride

A reveler poses along Market Street during the 40th annual San Francisco Pride parade on June 27, 2010. (AP)

2010 San Francisco Pride

A performer rides in a cupcake costume along Market Street during the San Francisco's 40th annual San Francisco Pride parade on June 27, 2010. (AP)

2010 San Francisco Pride

Participants take part in the San Francisco's 40th annual San Francisco Pride parade on June 27, 2010. (AP)

2010 San Francisco Pride

Member of the Dykes on Bikes ride their motorcycles down Market Street at the start of the San Francisco's 40th annual pride parade on June 27, 2010. (AP)

2010 San Francisco Pride

A dancer performs for the crowds along Market Street during the annual San Francisco Pride parade on June 27, 2010. (AP)