An anonymous reader writes "Yahoo! News is reporting that two labs are currently competing to design the first new nuclear bomb in twenty years. The new bomb was approved as a part of the 2006 defense spending bill. From the article: 'Proponents of the project say the U.S. would lose its so-called "strategic deterrent" unless it replaces its aging arsenal of about 6,000 bombs, which will become potentially unreliable within 15 years. A new, more reliable weapon, they say, would help the nation reduce its stockpile.'"