American officials say that they monitor closely the ethnic composition of the Afghan security forces for any hints of ethnic tension.

NEWYORKER: After America

What were the implications of this new perspective on national security for the size and composition of the U.S. military?

CENTERFORSECURITYPOLICY: Center for Security Policy | The Measure of a Superpower: A Two Major Regional Contingency Military for the 21st Century | Page: 2

"Additionally coalition forces will realign battle space as necessary based on the composition of the coalition, the readiness of the Iraqi security forces and the threat situation, " Matern said.

CNN: Coalition nations leave Iraq as security improves

Brennan, the president's top counterterrorism advisor, a much broader analysis will be needed -- one that covers the entire homeland security system, is independent of the executive branch, and is bipartisan in the composition of its membership.

CNN: Blame game won't stop terrorism