Coalition apologizes for killing Afghan child in airstrike

Karzai has said the attack has shaken his confidence in coalition troops.

Top commander vows an immediate probe as officials hasten to shore up prospects of a security deal.

Karzai claims U.S. drone strike killed child

Karzai claims U.S. drone strike killed child

Afghan president says he won’t sign long-term security agreement if similar attacks continue.

Karzai plans to intensify showdown with U.S., aide says

Karzai plans to intensify showdown with U.S., aide says

The Afghan leader signals he thinks the U.S. is bluffing on a security pact timetable; the U.S. has not budged.

Karzai digs in on delay for U.S. troop accord

Karzai digs in on delay for U.S. troop accord

Afghan president’s spokesman insists agreement won't be finalized until after April election.

U.S., Pakistan in dispute over drone attack that killed six

U.S., Pakistan in dispute over drone attack that killed six

The attack was a rare strike outside of tribal areas. U.S. officials deny it targeted an Islamic seminary.

Kerry: U.S., Afghanistan agree on language of security pact

Kerry: U.S., Afghanistan agree on language of security pact

The draft, which includes immunity for U.S. troops, now goes to an Afghan council for consideration.

U.S. to offer Afghans assurances to resolve dispute

U.S. to offer Afghans assurances to resolve dispute

The U.S. will put assurances in a letter, which Obama is likely to sign to resolve dispute over American military presence.

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Tracking America’s drone war

Armed drones have become a vital element of U.S. national security policy. This project documents ongoing drone strikes in Pakistan, Yemen and Somalia.

Obama awards Army captain Medal of Honor

Capt. William Swenson was awarded the honor for his bravery during the Battle of Ganjgal, one of the deadliest battles in the Afghan war.

U.S. drone network in the Middle East and Africa

As the U.S. military withdraws from Afghanistan, the Pentagon is shifting its fleet of drones to other global hot spots.

Chemical weapons stockpiles around the world

Russia and the U.S. rank highest in the number of declared chemical weapons. See who else has declared chemical weapons under the Chemical Weapons Convention.

Who has signed the Chemical Weapons Convention

After Syria signed the treaty, it became the 190th country to join the international convention outlawing chemical weapons.