President Bush accepts the resignation of John Bolton, who is the U.S. ambassador to the United Nations. Bolten resigned as his recess appointment is expiring. Guest: Demetri Sevastopulo, Pentagon and intelligence correspondent for the Financial Times

What kind of defense secretary will Robert Gates be? We speak about his record at the CIA with Art Hulnick, professor at Boston University and with John Prados, who is the National Security Archives at George Washington University.

Researchers at the Walter Art Museum are studying an ancient document that contains the work of the Greek mathematician, Archimedes.

We speak to the winners of the 2006-07 Siemens Competition in Math, Science, and Technology. The competition features the brightest high school thinkers.

Bill Littlefield speaks with actor, Marty Maguire. Maquire stars in the play A Night to Remember, which looks at the troubles in Northern Ireland and how a football game led to one man's journey from bigotry to understanding.