The issue is that as you go out over time and private borrowing picks up, you want to make sure that you're getting ahead of the fiscal deficit problem, so that you're not substantially crowding out private activity.

WHITEHOUSE: Detailing the FY2011 Budget

An infrared camera in each lens then picks up those signals and uses them to coordinate the location of your pupils, tracking what you're looking at.

ENGADGET: 'Talking Places' is the Google Glass of tour guides, we go hands-on (video)