dr. sanjay gupta at the united nations general assembly. he's in new york with a look at how brazil's president overcame torture. this is today's "human factor "0 ". >> reporter: dilma rousseff, a name you should probably remember for lots of different reasons. quite a remarkable individual. the first woman actually going to be speaking to the u.n. general assembly, giving one of the opening keynote addresses, also the first woman to be president of brazil. 63-year-old rousseff, quite an extraordinary history, she was a revolutionary in brazil in the late '60s and '70s. she was captured, tortured, told to stay out of government. she subsequently became the chief of staff to the brazilian president and now president herself. in the midst of all that, back in 2009, she also developed nonhodgkin's liymphomlymphoma, h she was treated. in fact, she gave a speech where she lifted up the wig and said, look, i'm in remission as a result of the treatments i have received. she wants to do a lot...