Tonight... Get on On the Record with Greta!

What's the latest news in Operation Iraqi Freedom? A fierce sandstorm with hurricane force winds slowed the the U.S.-led advance on Baghdad as British forces battled an estimated 1,000 Iraqi militiamen in the southern city of Basrah, where they captured a senior Iraqi official in a raid and killed 20 of his armed guards.

A British reporter, Richard Gaisford, reported Basrah residents were staging an uprising against pro-Saddam Hussein forces and that Iraqi troops were firing mortars at them. Coalition forces were firing missiles at the pro-Saddam forces.

Although the situation in Basrah couldn't be offcially confirmed by officials on the United States, U.S. Marine Maj. David C. Andersen Marines said: "We've had reports we can't substantiate as of yet of an uprising in Basrah. We are closely monitoring the situation." And Defense Secretary Donald H. Rumsfeld, who also couldn't confirm the report, said at a briefing at the Pentagon today, "anyone who's engaged in an uprising has a whale of a lot of courage and I sure hope they're successful."

Gainsford, who is embedded with British forces, said British troops backed by tanks and armored vehicles were massing on the outskirts of Basra and were planning to enter the city to support the anti-Saddam elements.

Also, multiple and specific intelligence reports say that special Republican Guard troops are said to be representing themselves as U.S. troops and then executing regular Iraqi soldiers if they to desert, surrender or escape. We'll have more on this very disturbing situation.  

Plus, we'll have the latest on the march towards Baghdad, the situation in Basrah and the rest of the military campaign.

We'll get analysis from two of our FOX News Military Analysts, former USAF Maj. Gen. Burton Moore and retired US Army Lt. Col. Bob Maginnis.

Don't miss On the Record with Greta Van Susteren LIVE at 10 p.m. ET! 

--The Associated Press contributed to this report.

--All topics and guests are subject to change.

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