Obama speaks on Afghanistan Tuesday; goes to climate summit Dec. 9 (Copiled)

Two key scheduling matters:

President Obama will make his case for a new strategy in Afghanistan on Tuesday at 8 p.m., from the U.S. Military Academy at West Point .

Obama will attend the Copenhagen global warming summit on Dec. 9, a day before he accepts the Nobel Peace Prize in Oslo.

In his Afghanistan speech, Obama will lay out his plans for troop increases along with an exit strategy for the war now in its ninth year, White House press secretary Robert Gibbs said.

"We're not going to be there another eight or nine years," Gibbs said, adding that Obama had not told him how many additional troops he plans to deploy to the region.

Gibbs said the president will also discuss the financial costs of the war.

"It's very, very, very expensive," Gibbs said.

As for the big international climate summit in Copenhagen, White House environmental adivser Carol Browner said the president will offer to reduce U.S. greenhouse emissions to 17% below their 2005 levels over the next decade.

Obama speaks on Afghanistan Tuesday; goes to climate summit Dec. 9 (Copiled)