YouTube shooter posted bizarre videos, manifesto before rampage:
A deranged gun-wielding woman who posted a bizarre online manifesto blasting YouTube opened fire Tuesday at the company's northern California headquarters, wounding three people and then killing herself. Nasim Aghdam, 38, was armed with a handgun when she strolled onto the YouTube campus in San Bruno at about 12:45 p.m. and began shooting, police said.
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