OHIO - Steve Kroft talks to Democratic presidential contenders Hillary Clinton and Barack Obama and reports from Ohio, whose primary voters next Tuesday could determine which candidate is nominated. Frank Devine, Michael Radutzky and Tanya Simon are the producers.

LIFELINE - Remote Area Medical was founded to bring free medicine to the remote parts of the world but now also helps thousands of the estimated 47 million Americans who have no health insurance and others who are underinsured. Scott Pelley reports. Henry Schuster is the producer.

THE PENTAGON'S RAY GUN - Straight out of Buck Rogers and perfect for crowd control, this non-lethal weapon could help eliminate the deaths incurred while trying to control crowds, especially in Iraq. But it’s not in Iraq yet, reports David Martin. Mary Walsh is the producer.