<p>WASHINGTON - The Bush administration has settled on a plan for a possible invasion of Iraq that envisions seizing most of the country quickly and encircling Baghdad, but assumes that Saddam Hussein will probably fall from power before U.S. forces enter the capital, senior U.S. military officials said.</p>
<p>Hedging its bets, the Pentagon is also preparing for the possibility of prolonged fighting in and around Baghdad. Administration war planners expect that, even if the Iraqi president is deposed, there could be messy skirmishes there and in Saddam's hometown, Tikrit, the military officials said.</p>