a day after the tragedy in chattanooga, more information about the four marines that were murdered. jennifer griffin at the pentagon with more. >> we now know the names of all four marines killed in chattanooga. sullivan age 40 from springfield, massachusetts, he joined the marines in 1997. he graduated from cathedral high school. he has two siblings and returned from his last deployment in january. he and the others served in the third battalion 14th marines and fought in the 2005 battle of abu ghraib. he received two purples hearts. skip wells was the youngest. age 21.