NATO forces inspects an Afghan army bus in Kabul earlier this year (rt.com)

The attack makes it the deadliest day of the decade-long war for U.S. troops in Afghanistan according to U.S. military and Afghan officials. 

According to the Washington Post, such violence is rare in the city where the attack occurred (near American University on Darulaman Road in Kabul), particularly against U.S. troops who normally do not patrol there.

The Taliban claimed responsibility for the bombing through text messages, claiming that 1,500 pounds of explosives had been used to accomplish their goal. 

For more information, also read the Los Angeles Times article here.

Reach writer Mike Vulpo here