Guantanamo Bay Naval Base, Cuba ? A session of the Guantanamo war crimes court that began Sunday will likely show the difficulties President Barack Obama faces in changing the system and closing the prison by January.

The case in question, of a Canadian charged with killing an American soldier, is stalled by infighting among lawyers.

Other defendants have even more complex legal issues, and officials say the U.S. may have to choose between delaying Guantanamo’s closure or quickly finding somewhere else to hold the trials.

But the Obama administration has not found a replacement for Guantanamo. So when the judge in the trial of Omar Khadr decided a pretrial hearing was necessary, the military had no choice but to hastily arrange a charter flight to bring attorneys, court personnel and a dozen journalists to the U.S. base in Cuba.