Modern freighters are too wide to pass through the Panama Canal. So the Panamanians are expanding it. In the first of three stories, Technology Correspondent Jason Margolis tells how this tiny country is taking on a massive construction project.

The White House today urged all sides in the conflict in Lebanon to "step back" from the fighting. But such pleas by the Bush Administration have been falling on deaf ears in Lebanon and elsewhere in the Arab world. The World's Katy Clark explains why Washington may be losing its leverage in the Middle East.

Iran is a major oil producer, but it has to import gasoline to keep up with the demand there. That's because gas prices are heavily subsidized. Now Tehran is preparing to raise prices and start rationing cheap gas. Roxana Saberi reports from Tehran.

Palestinian militants in Gaza have fired more rockets at the Israeli town of Sderot. Residents in southern Israel are preparing for more attacks to come. The World's Aaron Schachter reports from the Israeli city of Ashkelon.

Anchor Lisa Mullins speaks with correspondent Kate Seelye about some of the pressures that may have sparked the violence now raging in a Palestinian refugee camp in Lebanon. Government troops are battling Islamist militants there.

Dozens have died in two days of fighting at a Palestinian refugee camp outside the Lebanese city of Tripoli. We'll hear from a reporter who witnessed some of the fighting. Ghaith Abdul Ahad, a correspondent for Britain's Guardian newspaper, speaks with anchor Lisa Mullins from just outside the camp.