A Taliban suicide bomber rammed a van into an armored NATO bus Saturday in Kabul, killing 13 NATO troops and four Afghans, U.S. and Afghan officials said, in the deadliest attack on coalition forces in more than two months.

The Osprey was extremely expensive to develop and had multiple crashes during testing. The Marines flying it today in Afghanistan now sing its praises, but its high cost is now an issue as the Pentagon looks for cuts.

Secretary of State Hillary Clinton has just returned to the U.S. after a weeklong trip through Central Asia. Most of her stops were associated with two issues: the war in Afghanistan, and frayed relations with Pakistan. Clinton described her talks with U.S. and Pakistani military leaders as very comprehensive.

The Afghan president's comments come only days after U.S. Secretary of State Hillary Clinton visited both countries and said Islamabad must do more to crack down on militants using its territory as a staging ground for attacks on Afghanistan. Afghanistan's army is being trained and funded by primarily U.S. assistance.

Obama has always been opposed to the war in Iraq, and is fulfilling a campaign promise to bring the American involvement to an end. He says troop levels in Afghanistan will also be coming down.

Secretary of State Hillary Clinton, in Pakistan to urge the country's leadership to eliminate safe havens for terrorists, says that U.S. officials met with the Haqqani network this summer. She did not say who the participants were, or what was discussed.