Afghan insurgent group Hizb-e-Islami claimed responsibility for the attack, saying it plans further attacks against foreign troops.
A helicopter carrying foreign nationals made an emergency landing due to poor weather conditions in Afghanistan, where they were seized by the Taliban.
The 13 soldiers killed were members of Afghanistan's Third Battalion, one of only a small number of Afghan Army units rated as fully self-sufficient by the US military.
A familiar question for the US secretary of State following the death of US diplomat Anne Smedinghoff.
This week's round-up of Good Reads includes helping dogs who come home from war zones, the dilemma behind telling Malala Yousafzai's story, why more mothers aren't choosing marriage, and a quest to bring back the wooly mammoth.
Afghan officers canceled a visit to Quetta, Pakistan, for military drills after scores of shells were fired across the countries' shared border. Pakistan is seen as key to promoting a stable Afghanistan.
On the heels of Secretary of State Kerry's surprise visit to Afghanistan, two separate attacks injured at least 15 Afghans. The Taliban claimed responsibility for one.
A lot of aid to Afghanistan has been squandered. The latest project indicates that the US still doesn't seem to understand the country's basic needs.
That two more US troops were killed by an Afghan soldier today is a reminder that the Afghanistan 'surge,' which ended last year, accomplished few of its objectives.
The ambush and killing of 16 Afghan soldiers last weekend is one of the worst setbacks for the country's military in years.
The NATO-led coalition said a data entry error led to a claim last week that Taliban attacks had fallen 7 percent last year. In fact, there's little change. So what did we get for the surge?
Afghan President Hamid Karzai would like to make it very clear that he doesn't like the US, his principal protector and patron.