Les Blank dies at 77; prolific documentary filmmaker

His 42 films mostly depict slices of folk culture, but his best known, 'Burden of Dreams,' documents director Werner Herzog's fanatical making of 'Fitzcarraldo.'When Les Blank arrived in the lush, untamed Amazon in 1981 to make a documentary about Werner Herzog's film, "Fitzcarraldo," he knew the German's reputation as a daredevil director. Herzog had chosen the remote jungle locale, plagued by tribal skirmishes and the perils of nature, for authenticity.