Peter "Pete" Seeger (May 3, 1919 – January 27, 2014) was an iconic American singer-songwriter and activist. His songs are standards in the American folk song repertoire. Seeger was also known as a committed activist, particularly in the civil rights and environment movements. He co-founded the Hudson River Sloop Clearwater project in 1966. Most recently, Seeger, still performing at age 90, led the crowd in singing Woody Guthrie's "This Land is Your Land" at Barack Obama's inauguration celebration.