environmentalists staged a silent protest, leaving their shoes in the squararthey had planand to walk through. but as with so much in this still mourning city, life marches on. the president will also have the chance here in paris to meet with russia's vladimir putin and other world leaders who also are juggling the immediate danger of terrorism with thehexistential threat of climate change. margaret brennan, cbs news, paris. >>> here ithe u.s. republican presidential front-runner donald trump continues to court controversy on the campaign trail. the latest, his remarks about a nancy cordes has more. >> reporter: trump insists he didn't know that "new york times" reporter serge kovaleski suffers from a physical disability that limits the movement of his arms. but it sounded like trtrp knew him when he said this in myrtle beach tuesday night. >> written by a nice reporter. now the poor guy, you've got to see this guy, oh, i don't know what i said, i don't remember. >> reporter: the "times" said it was outraged that he would ridicule the physical appearance of one of our reporters. trum