2009: First openly LGBT group invited

President Obama, who later became the first president to support same-sex marriage, invited the Lesbian and Gay Band Association to participate in his inaugural parade. They are returning for the 2013 inauguration. The Lesbian and Gay Band Association was founded in Chicago in 1982 by seven member bands and now consists of 37 member organizations in the United States, Canada, Australia, Ireland and the United Kingdom.

Credit: lgba.org