Taliban bombers have struck again, trying for one of their largest, most sophisticated attacks of the year.  But it's an assault that NATO says didn't succeed.

FOX News Radio's Kerin McCue reports in our ongoing series on national security:

Securing America.

The target this time was a joint U.S.-Afghan air base in eastern Afghanistan; utilizing car bombs, aiming for - and detonating - the vehicles at the main gate around 6am Sunday.  U.S. helicopter gunships responded, sparking a two-hour long gunbattle.

When it was over, all nine of the attackers were dead.  At least five Afghans died in the assault, two of them medical students caught up in the crossfire.  A NATO spokesperson describes the Taliban attack, the largest of its kind since February, as a failure.

Kerin McCue, FOX News Radio.