Edward Young, whose automotive transport business is based in Milford, Conn., arrives to pick up a car to be delivered to Pennsylvania from the Valenti auto dealership in Watertown, Conn. Rick Hartford/Hartford Courant hide caption

itoggle caption Rick Hartford/Hartford Courant

Traumatic brain injuries are most often caused by powerful blasts from improvised explosive devices. A roadside bomb explodes, and the concussive effect violently shakes the brain inside the skull. Stefano Rellandini/Reuters /Landov hide caption

itoggle caption Stefano Rellandini/Reuters /Landov

The Wounded Warrior Home Project is an inventive approach to military housing, serving the needs of wounded soldiers and their families as they continue to serve on active duty at Fort Belvoir, Va. Kainaz Amaria/NPR hide caption

itoggle caption Kainaz Amaria/NPR

Sgt. Victor Medina suffered brain damage in 2009 when a roadside bomb exploded in Iraq. Blake Gordon/Aurora Photos hide caption

itoggle caption Blake Gordon/Aurora Photos