Ira Leifer, next to an RV he has outfitted with methane sensors and other equipment to sniff the air.
Not Your Grandpa's RV: This Roving Lab Tracks Air Pollution
()Atmospheric scientist Ira Leifer installed special air sensors on a camper, then drove from Florida to California, measuring methane levels all along the way. More than 6,000 readings later, he found some noticeable spikes, especially around petrochemical plants and urban areas like Los Angeles.
The Two-Way
WATCH: NASA Spots Brightest Lunar Explosion Ever Recorded ()
A nearly 90-pound meteoroid produced a one-second flash visible with the naked eye. Since NASA started tracking lunar strikes in 2005, it has counted more than 300 of them.
It's All Politics
Immigration Bill Chugs Along, But Some See Deal-Breakers()
The bipartisan immigration overhaul proposed by the Senate's Gang of Eight has been the target of scores of amendments. So far, the bill has largely held its own, but its prospects for getting through Congress are uncertain.
It's All Politics
Why The IRS Scandal Is Built To Last()
May 17, 2013 Of all the current Washington scandals, the one involving the IRS appears to have the most staying power. It rolls into one package an agency many love to hate, partisan suspicions and the American appetite for conspiracies.
The Two-Way
Russian Official Names CIA Station Chief In Moscow()
The breach of protocol comes after Russia expelled an American diplomat they said was a spy. Analysts said the potential outing is an escalation.
The Two-Way
North Korea Fires Three Short-Range Missiles, Says The South()
The launch comes at a time when tensions had been ebbing, following months of escalating tensions, including threats of nuclear strikes. All three missiles landed in the waters off the country's east coast.
The Two-Way
Toronto Mayor Blames Newspaper For Cocaine Video ()
May 17, 2013 The Toronto Star says its reporters have seen a video that purportedly shows Mayor Rob Ford smoking crack cocaine.
It's All Politics
Conservative Advice To GOP: Don't Legislate, Focus On Scandals()
May 17, 2013 The political arm of the conservative Heritage Foundation wants GOP leaders to set aside legislation like the farm bill that might turn attention away from questions about the IRS and Benghazi.
The Two-Way
French President Signs Same-Sex Marriage Into Law()
Parliament had passed the legislation in April, but the main opposition party challenged its constitutionality. A ruling by the Constitutional Council Friday paved the way for President Francois Hollande's official blessing.
