Gen. Richard Myers, chairman of the Joint Chiefs of Staff, indicated the coming days might bring neither an all-out fight for the city, as many have predicted, nor a conventional siege of the capital.
As CBS News Correspondent Jim Stewart reports, two scenarios for the final act in Baghdad are being suggested. The first is the largely successful British model used in Basra where troops have done some house to house searches, but the tactic has been to keep the city surrounded, while allowing civilian traffic to come and go and hitting military targets inside as they pop up. The hope is that the city will implode following a popular uprising.
The other scenario also calls for surrounding the city, but rather than turning it into a vast battleground, it would become a landscape of pinpoint targets. Baghdad International Airport, the possible seat of an interim government, is already in allied hands. That could be followed by the seizure of key electrical and water plants and then surviving communications facilities.
Then, rather than fight it out street by street, the city could be chopped into manageable blocks with the seizure of key bridges across the Tigris River and large stadiums and parks where helicopters could insert troops.
The goal would be not to lay siege, but to tighten the squeeze on what's left of the Iraqi leadership, with the hope that in the days or even hours ahead the lights will go out on them as well.
Over time, Saddam Hussein and his inner circle would lose completely their ability to communicate with Iraq's military forces, which already are in a state of disarray, and to control water and electricity, Myers said.
"Whatever remnants are left would not be in charge of anything except their own defense," he said.
Although he did not rule out any scenario for Baghdad, Myers' comments strongly suggested that the intention is to bleed Saddam's government of its political and military authority without launching an all-out ground assault that would risk high casualties.
He did not suggest that it would be easy, and Defense Secretary Donald H. Rumsfeld said, "There likely will be difficult days ahead."
"When you get to the point where Baghdad is basically isolated, then what is the situation you have in the country?" he said at a Pentagon news conference. "You have a country that Baghdad no longer controls, that whatever's happening inside Baghdad is almost irrelevant compared to what's going on in the rest of the country."
In a step toward gaining control of key levers of power, U.S. soldiers began an attack Thursday on Saddam International Airport on the western edge of the capital. Other important targets may be the Rasheed military air base in southeastern Baghdad and bunker complexes known to the U.S. military.
The airport is important at this stage because once it's secure it can be used to bring in more troops, military equipment and humanitarian aid. Patriot anti-missile batteries would be part of security around the airport.
U.S. diplomats were caught off guard by Myers' suggestion that an interim government could begin taking shape while Baghdad is isolated by U.S. troops, perhaps for a lengthy period of time.
One senior official on Bush's foreign policy team, speaking on condition of anonymity, complained the comments could send a signal that U.S. officials are not confident of their ability to overrun Baghdad.
But another senior official, this one familiar both with Bush's military and diplomatic plans, said Myers' comments reflected White House strategy. It is partly a political and psychological tactic: The United States does not want Saddam to think holding off coalition forces could slow his demise. Sending the message that the government is already irrelevant could help turn Iraqi military and citizens against the leadership, the official said.
Militarily, the second official said that while the bulk of U.S. troops remain outside central Baghdad, special forces will be active inside the capital, seeking targets to undermine the leadership and break the will of Iraqi troops to fight — perhaps without a full-out U.S. assault.
Rumsfeld, appearing with Myers, said U.S. ground forces led by the Army's 3rd Infantry Division and the 1st Marine Expeditionary Force had arrived "near the regime's doorstep." He did not say what might happen next, but he emphatically ruled out any deal that would save Saddam.
"There's not a chance that there's going to be a deal," he said. "It doesn't matter who proposes it, there will not be one."
He denounced those behind any talk of deal making.
"The inevitable effect of it, let there be no doubt, is to give hope and comfort to the Saddam Hussein regime and give them ammunition that they can then try to use to retain the loyalty of their forces with hope that one more time maybe he'll survive," Rumsfeld said.
Myers' remarks were the most expansive explanation of how the Pentagon hopes to avoid urban warfare.
He cited several factors that U.S. officials believe will work in their favor. Among them:
About half of the 5 million people in Baghdad are Shiite Muslims, who have been oppressed by Saddam's regime. "You could assume that they might be helpful" to the U.S. cause, he said.
At some point an Iraqi interim administration will take shape, "starting to work the post-conflict governance," Myers said. "It'll take some time. But you'll have that." He gave no details.
Even if the government does not collapse or fall victim to a coup, there may be no rush to dispose of it, Myers said. "You'll start working at it as you can. But one of the things you can do is be patient about that."
Also, the allies have control of Iraq's southern oilfields, which account for at least half the country's oil resources, Rumsfeld said.
Asked about oilfields in the north, he said, "We have to assume that they've been wired with explosives, as some were in the south."
However, he added that war commander Gen. Tommy Franks had ways of dealing with that problem "at the right time."
American and British forces say oil facilities secured in southern Iraq include 600 of the 1,000 wells and a crucial export terminal on the Persian Gulf. However, Iraq still controls more than 600 wells in the north, and is reported still pumping crude.
There is a small U.S. force in Kurdish-controlled northern Iraq -- about 1,200 paratroopers and other special forces units.
Myers said allied forces now control about 45 percent of Iraq's territory.