Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
A look at Obama's immigration plan. Plus, how long Takata knew of problems with its airbags.
Killeen, Texas (CNN) – With the community reeling from a shooting rampage at Fort Hood, investigators are grappling for answers on why Spc. Ivan Lopez opened fire against fellow soldiers.
Investigators are looking at a possible altercation with a soldier "that immediately preceded the shooting," said Lt. Gen. Mark Milley, the post's commanding general.