Many service members who have returned from Afghanistan and Iraq have PTSD or depression, but only some who need treatment actually seek it. Catherine Herridge takes a look at a possible solution. “CBS Evening News with Norah O’Donnell” delivers the latest news and original reporting, and goes beyond the headlines with context and depth. Catch the CBS Evening News every weekday night at 6:30 p.m. ET on the CBS Television Network and at 10 p.m. ET on CBSN.