An exclusive Al Jazeera investigation has found that the number of existing security forces in Afghanistan has been greatly exaggerated with widespread desertions by members of the army and police.

Senior officials in the Obama administration say US troops will start to return home from July of 2011.

That is when Afghan forces are supposed to be ready to take over.

But an investigation by Al Jazeera's James Bays shows that may not be feasible.

Source: Al Jazeera