I have no grave site to visit, no place to bring my mother her favorite yellow flowers, no spot where I can hold my weary heart close to her. All I have is Ground Zero. On the morning of Tuesday, Sept. 11, 2001, I watched as terrorists slammed United Flight 175 into the South Tower of the World Trade Center, 18 minutes after their accomplices on another hijacked plane hit the North Tower. My mother was on the flight. I witnessed her murder on live television. I still cannot fully comprehend those images. In that moment, I died as well....