(151212) -- SAN FRANCISCO, Dec. 12, 2015 (Xinhua) -- Boats decorated with lights parade along the waterfront near Fisherman's Wharf in San Francisco, the United States, on Dec. 11, 2015. A holiday tradition since 1994, the 2015 Holiday Lights  &amp; Sights Boat Parade was presented in San Francisco on Friday evening to celebrate upcoming Christmas. (Xinhua/Liu Yilin)