**ADVANCE FOR MONDAY, JUNE 25 ** FILE ** Folk singer Joan Baez sits at the corner of Haight and Ashbury in San Francisco, serenading hippies and tourists in this file photo taken Friday, Sept. 22, 1967. If the Summer of Love established San Francisco as the hub of hippiedom, the summer of 2007 may one day be remembered as a time when the city and the rest of the country commemorated 1960s counterculture by taking the "counter" out of it. (AP Photo/File)