Survivors of the US atomic bombings of Japan will receive the Nobel Peace Prize on Tuesday, but after years of anti-nuclear campaigning and showing the world their scars, they still retain the painful memories of the discrimination they have faced. Many survivors chose to live in relative isolation, finding that Tokyo's dense population allowed them to "hide", said Michiko Murata, 73, who helps run Toyukai, an association of A-bomb survivors in the capital. Some members of the group built a shared grave in western Tokyo in 2005. IMAGES AND SOUNDBITES