vote. no matter who you vote for, get out and vote. that's your duty. voting and serving on a jury, that's so important to who we are. so many people have fought for that right, and i don't care what side you're on, just vote. >> paula duncan, thank you. >> thanks. >> what an interesting discussion. sad news tonight about senator john mccain. he has discontinued his treatment for brain cancer. as tributes to his service and heroism pour in from washington, heroism pour in from washington, we'll get the very latest next. bulb of light?!? aha ha ha! a flying machine? impossible! a personal' computer?! ha! smart neighborhoods running on a microgrid. a stadium powered with solar. a hospital that doesn't lose power. amazing. i like it. never gonna happen.