to stone's row home outside pennsylvania. with no response s.w.a.t. teams lobbed in gas canisters. once inside, no suspect. family, friends, and neighbors who knew stone said he suffered from post-traumatic stress disorderer and discharged from the military because of it. he's considered armed and dangerous because of it. >>> our hearts go out to the families of katrina dawson and tori johnson. these were decent, good people who were going about their ordinary lives. >> a nation on edge after the hostage standoff. the 16 hours of terror over in just seconds. the video heart stopping. heavily armed cops storming the cafe. windows lit up by flash grenades. not everyone survived. two hostages were killed. 34-year-old tori johnson who managed the cafe, and 38-year-old katrina dawson, also dead this man. the face of terror, the gunman man heron. as for the investigation? >> this will take time for us to get all the information so we can piece together bit by bit exactly what happened. >>...