Its very simple. If they are our alies, and want our support and money. They either open up the routes or loose every dime until they do, and the payments would not be retroactive. If we can't get what we pay for, stop paying.

CHICAGO - President Obama and Pakistani President Asif Ali Zardari met briefly today on the sidelines of the NATO summit, but made no progress toward resolving their diplomatic standoff over supply routes into Afghanistan.

Their meeting, which was also attended by Afghan President Hamid Karzai, comes amid mounting tension over Pakistan's
refusal to re-open its Afghanistan border to NATO, forcing the United
States and others to supply their forces through longer, alternative
routes. The channels would also be crucial to NATO's exit plan to
withdraw forces and military equipment from Afghanistan, posing a
potential logistical nightmare for the alliance.

"President Zardari
shared with me his belief that these issues can get worked through,"
Obama later told reporters at a press conference. "We didn't anticipate
that the supply line issue was going to be resolved by this summit. We
knew that before we arrived in Chicago. But we're actually making
diligent progress on it.

http://news.yahoo.com/obama-presses-pakistani-president-open-...