<p>KABUL—The Taliban's weekend assault on a major coalition base was one of the most determined and effective ever seen in Afghanistan, according to details released Sunday, destroying six U.S. combat jets and damaging two others.</p>
<p>In addition to the Taliban strike, which killed two U.S. Marines Friday night, two separate insider attacks by Afghan service members claimed the lives of six coalition troops. A lethal coalition airstrike, meanwhile, threatened to raise additional tensions in the country, amid reports of civilian casualties.</p>