FILE - In this April 23, 2010 file photo, Christy Turlington Burns attends the premiere of 'Nice Guy Johnny' as part of the Tribeca Film Festival in New York. Turlington Burns' first film, 'No Woman No Cry' will be shown Saturday, Oct. 23, at the London Film Festival. (AP Photo/Charles Sykes, file)AP – Model Christy Turlington Burns’ first foray into documentary filmmaking is to be shown Saturday at the London Film Festival.