This is SCIENCE FRIDAY. I'm Ira Flatow. Last week, the SpaceX Dragon capsule splashed down in the Pacific, wrapping up a glitch-free journey to the International Space Station. It was an historic first. The Dragon is really the only private spacecraft to have made the trip. This time there was only cargo aboard. But it will be - not be long before astronauts are hitching rides on the Dragon? That's what SpaceX is planning for next, and they hope to have seats ready for travelers by 2015. So you can mark that in your calendar.
Alan Alda challenged scientists to explain what a flame is to an 11-year-old. Three months and more than 800 entries later he is back with the winner of the contest. Ira Flatow and guests discuss the winning entry and why the contest was an effective exercise in science communication.
And today's last word in business is: Don't drive like my brother. That's the sign off heard each week at the end of NPR's most popular program. Were talking, of course, about CAR TALK. Brothers Tom and Ray Magliozzi have been dispensing humorous auto advice on the radio for more than 25 years. But today, the duo said they're putting the breaks on the program. In October they'll call it quits and no longer record new episodes.
An operation by U.S. Immigration and Customs Enforcement's (ICE) Homeland Security Investigations (HSI) has led to the arrest of 190 people accused of producing, distributing or possessing child pornography.
"Let this operation be a warning to anyone who would think they can use the Internet to exploit children: we are out there looking for you, we will find you, and you will be prosecuted," ICE director John Morton said in a statement.