"So when will we be able to say this was a success? Do you think we'll look back on it -- is it 10 years? When is it a fair time to judge whether this war is a success or failure?" MSNBC's Chuck Todd asked.
"I think the transition test will come at the end of 2016 and into 2017 as we go forward to see how well their military holds and what the situation is on the ground," Kerry replied.
"But ultimately, every American understands that we cannot determine this outcome for the Afghans. Afghans have to determine this for themselves," he continued. "I think Americans can be extraordinarily proud of the steps we have taken to give Afghanistan that opportunity. And now it is really increasingly up to them."