> Lacking land to rule, Islamic State's leader, Abu Bakr al-Baghdadi, can no longer be considered a caliph. While his followers still consider him the groups commander, he's on the brink of losing the two main centers of his so-called caliphate, Raqqa in Syria and Mosul in Iraq.
But officials say even though he's on the run, it may take years to capture or kill him. The US has a $25 million bounty on his head. Experts say one of his main concerns will be that those around him don't betray him for the cash reward. Reuters correspondent in Erbil says they've been told Baghdadi travels in ordinary cars, and keeps a low profile.
>> When he travels, he only has a driver and two bodyguards. He doesn't stay more than 72 hours in any one place, and he's moving all the time in an area which is like a rectangle over the Syrian and the Iraqi border.>> Officials say Baghdadi also no longer uses a phone, swapping it for couriers to communicate with his top aides.
>> It could take years for forces hostile to him, whether Americans or others, Iraqis or Syrians, to capture him or kill him, because he's obviously, I mean, the areas is just vast. And it's populated with tribes. Some of them are loyal to him, or loyal in general to the Sunni insurgency that Europe presents.
>> This is the last public video of him. It was in this mosque in Mosul in 2014 that Baghdadi first declared himself the leader of all Muslims. He's now a fugitive, and hasn't released a recorded speech since last year.