WBUR's Carey Goldberg met up with the scientists and engineers who are taking on the challenge some call "a moon shot for the mind."

Having a full-blown stroke can cause post-traumatic stress disorder, and that's also true for tiny strokes called TIAs, a study finds. Worry over future stroke risk may be a factor.

There's overmedicating and self-medicating, but some vets are "de-medicating." Prescribed multiple drugs to deal with PTSD and pain, they've stopped taking them — without authorization.