Pat Tillman's widow chronicles struggles in new book

On April 22, 2004, former Arizona Cardinals safety Pat Tillman was killed in Afghanistan by friendly fire.

In a new book called "The Letter," his wife Marie Tillman chronicles her life with Pat and her journey through grief after his death.

The book title refers to a letter Tillman left for his wife "just in case" he was killed that she opened the night she learned of his death.

In it, Pat writes, "Through the years, I've asked a great deal of you. Therefore, it should surprise you little that I have another favor to ask. I ask that you live."

On Starting Point this morning, Marie discusses the cover-up of Tillman's death and her journey through grief after losing her high school sweetheart.