>> nanotechnology, dr. matheson, what does this mean in practical terms? >> first and foremost, no collateral damage. we have honed these machines to the point where they're able to deliver pops. >> i know her. i know her. how do i know her? >> aaron, i'm not going to lose you. aaron. aaron. aaron. >> don't want to miss that, so set your dvrs right now. "revolution" tomorrow night on nbc. we'll be right back. to steam cleaners, keyboard vacuums and microfiber cloths. yes, staples has everything you need for a germaphobe-friendly office... [ sneezes, coughs ] except germ-free coworkers. [ retches ] thousands of products added online every day... [ click ] even protective suits. [ sneezes ] now get 15% off your cleaning supply purchase.