President Barack Obama is considering four options for realigning U.S. strategy in Afghanistan, his spokesman said Tuesday, while military officials said the choices involve several ways the president could employ additional U.S. forces next year.

White House press secretary Robert Gibbs said Obama will discuss the four scenarios with his national security team on Wednesday. Speaking to reporters aboard Air Force One en route to Fort Hood, Texas, Gibbs would not offer details about those options. He insisted that Obama has not made a decision about troop deployments.

Gibbs said that anybody who says Obama has made a decision "doesn''t have in all honesty the slightest idea what they''re talking about. The president''s yet to make a decision" about troop levels or other aspects of the revised U.S. strategy in Afghanistan.

Obama and first lady Michelle Obama traveled to Killeen, Texas, Tuesday, where the president spoke at a memorial service for those killed in a shooting rampage at Fort Hood.

Military officials, speaking on condition of anonymity because the decision is pending, said the military services are developing presentations to explain how various force levels could be used in Afghanistan and how various deployment schedules could work, given recent promises to give soldiers more rest time at home.