How’s this for a shift? Bush, at noon Tuesday, will go from most powerful man in the world to simple Texas rancher. He’ll still get taxpayer-funded motorcades for the next 10 years, but there’ll be no more Air Force One. On his last morning as president, he’lll welcome the Obamas and Bidens to the White House for coffee; then, around 11 a.m., the Bushes and Obamas will ride together to the Capitol for the inauguration ceremony. After Obama’s big address, the Obamas will accompany the Bushes to the east steps of the Capitol for the outgoing leader’s final ride on Marine One, which he’ll take to Andrews Air Force Base for a departure ceremony with staff. Finally it’s on to Crawford on the plane formerly known as Air Force One, with a stop first in his hometown, Midland, for a welcome home event.