Rebels kill 24 in Iraq; sweep begins in capital

"BAGHDAD -- Gunmen killed at least 24 police officers, soldiers and government workers in Iraq on Monday, and an Iraqi general said that about 50 suspected insurgents were captured in the first days of a new security operation in Baghdad...

...The violence came as Iraqi forces reported a new offensive against the insurgents in Baghdad. An Iraqi general, who spoke on condition of anonymity, told AP that Operation Thunder began last week on the west side of the Tigris River, which divides the city.

He said about 50 suspected insurgents, including two Syrians, were captured in the opening days of the operation, which will be expanded over the next few days."
Chicago Tribune

I'll see if there is anything more on this new operation, Is this the "Big one" I don't know, yet.