here's 2010, you get the picture, look as we go, right up. right now, about 15% of the voting population is 65 or older. the forecast is that that number will climb as high as 26% by 2035. something to watch demographically. the demographics are what are driving the big debate over social security. it is politics that will drive the debate over what to do about it. but remember the demographics as that debate takes steam in the weeks and months ahead. when we come back, tonight's top headlines including a fascinating, troubling mystery in arkansas. what's killing all those birds? ♪ ♪ [ crowd groans ] ♪ [ crowd cheering ] [ male announcer ] at&t, the nation's fastest mobile broadband network. period. until the combination of three good probiotics