on the "newshour" tonight, we interview russia's ambassador to the united nations, vitaly churkin about syria and about u.s. ambassador susan rice's decision to take her name out of consideration to be secretary of state. >> woodruff: then, we turn to the fiscal crisis here at home. andrew kohut explains the latest poll numbers, showing strong support for the way president obama is handling the negotiations. >> warner: plus, ray suarez gets two views on proposals to raise the age of eligibility for medicare to 67, from 65. >> woodruff: it's bottoms up tonight for miles o'brien who reports on genetic links to alcoholism and other addictions. >> so far as i know, there's no law against reporting under the influence, so here goes something. while i may carry the genes of an irish pub crawler, my chances of becoming an alcoholic are slightly less. >> warner: and we talk with ambassador marc grossman about prospects for afghanistan as the u.s. prepares to withdraw troops by 2014 and as he leaves his post as u.s. special envoy to the region. >> woodruff: that's all ahead on tonight's "newshou