US signs endless-war treaty in Afghanistan, appears insane

Today, according to the Washington Post, the US and Afghanistan signed a security agreement that "allows for 9,800 U.S. troops to stay in the country past 2014 to help train, equip[,] and advise Afghan military and police forces."

We've been in Afghanistan since 2001. We've spent the past 13 years "help[ing] train, equip, and advise Afghan military and police forces." If it hasn't worked by now, there's got to be an underlying reason that requires a different approach.

It brings to mind Albert Einstein's definition of insanity as "doing the same thing over and over again and expecting different results."