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Long before the first bullet was fired in World War II, the US government made a deal with its military - serve 20 years and receive a pension worth half of your pay.

Since then, it has been an untouchable political promise. President Barack Obama has called it a "moral obligation".

But given the nation's debt, it may not be an obligation that the US can afford to keep.

Having studied the matter, a high-level Pentagon board is recommending changes to the system that will affect those currently serving in uniform.

Al Jazeera's Patty Culhane reports from Washington.

Source: Al Jazeera