Cathleen Alexis says she does not know why her son did what he did. The apology comes as high ranking U.S. officials acknowledge some red flags were missed. Linda So reports. - REUTERS

Mother Of Gunman Aaron Alexis Apologizes To Victims' Families

Cathleen Alexis says she does not know why her son did what he did. The apology comes as high ranking U.S. officials acknowledge some red flags were missed. Linda So reports. - REUTERS

Published: 19 Sep 2013