Twelve Americans, one Canadian, and four Afghans were killed in the Kabul suicide attack Saturday.
The US Embassy attack and others around Kabul cause few casualties but may signal the Taliban's desire to engage in a politically and psychologically effective war of attrition.
The claim adds to a series of mixed messages that are complicating the Taliban's efforts to become an accepted, legitimate political force in Afghanistan's government.
While the raid is unlikely to have a significant effect on the Taliban, it holds symbolic importance for the US Special Forces community.
SEAL Team Six: In death as in everyday duty, the SEALs and their families are insular, with their own intimate support system that few outsiders can grasp, residents with close ties to the unit said.
The rugged CH-47 Chinook helicopter that crashed in Afghanistan flies fast and has double the lift capacity of its Vietnam-era forebears. But it is loud, and vulnerable, while preparing to land.
Navy SEALs and Afghan troops were killed over the weekend in a helicopter crash south of Kabul. Navy SEALs, along with other US special forces, have been very involved in the war on terrorism.
The Taliban claimed responsibility for Saturday's deadly crash of a US military helicopter, and many Afghans say they doubt NATO's ability to turn back what appears to be fresh momentum for the Taliban.
A NATO helicopter was shot down while on a nighttime raid in Afghanistan, killing 31 US special-operations troops. Nighttime helicopter raids are an essential tool of counterterrorism.
Helicopter crash in eastern Afghanistan killed 31 US special forces troops and seven Afghan commandos. Officials are working to determine if insurgents brought down the craft, and if so, what technology allowed them to do so.