On Wednesday’s NewsHour…

BY newsdesk  August 25, 2010 at 4:13 PM EST

GEN. ODIERNO ON IRAQ SECURITY | A series of roadside bombs were set off in cities across Iraq, killing more than 50 people and wounding dozens of others. It is unknown whether the attacks have any connection with each other, so far no one has claimed responsibility. Margaret Warner talks to top General Raymond Odierno about the Iraqis’ ability to take over as the U.S. scales back on troops.

WINNERS, LOSERS IN PRIMARIES | Primary elections took place on Tuesday in five states nationwide. NewsHour Political Editor David Chalian assesses the winners, losers and surprises in primary elections.

MEXICO’S BLOODY DRUG WAR | The violence in Mexico’s drug war continues to intensify. The bodies of 72 migrants were found south of the U.S. border Wednesday and more than 28,000 people have been killed within the past three years. Journalist Ana Paula Ordorica and security analyst Eric Olson give a two-part look on the ongoing drug war and the steps Mexican officials are taking to end the violence.

ULTRA LIGHT CAR PROMISES 100 MPG | A new car may save customers more money and be easier on the environment with the promise of 100 miles per gallon. Judy Woodruff reports on a group of mechanics and engineers who want to change modern day cars.

Wednesday’s anchors are Gwen Ifill and Jim Lehrer. Hari Sreenivasan has the day’s other top news stories and look at the Web features. On The Rundown, read about Margaret Warner’s experience embedded with the U.S. Military in Mosul. Also, an investigative look at Hurricane Katrina nearly five years since the storm on tonight’s Frontline.

We hope you’ll join us.