The dollar has helped make the U.S. the most economically powerful country for most of the last century, but other countries – including rivals like China – have the greenback on their sights.

Chemical physicist Stafford Sheehan invented a process that can turn carbon dioxide into yeast. It's now a finalist in the NASA-sponsored Deep Space Food Challenge.

Annapolis Police Chief Edward Jackson said at a media briefing that the shooting stemmed from what he described as an "interpersonal dispute" and that there was no further threat to the public.

A bus carrying wedding guests rolled over on a foggy night in Australia's wine country, killing 10 people and injuring 25, police said. The 58-year-old driver was arrested.