Ten years ago: A military jury at Fort Hood, Texas, acquitted Army Sgt. 1st Class Tracy Perkins of involuntary manslaughter in the alleged drowning of an Iraqi civilian, but convicted him of assault in the Jan. 2004 incident. (Perkins was sentenced to six months in prison.) Rosemary Kennedy, the oldest sister of President John F. Kennedy and the inspiration for the Special Olympics, died at a Fort Atkinson, Wisconsin, hospital at age 86. Brad Pitt and Jennifer Aniston announced they were separating after 4 1/2 years of marriage.