Iron Man, Vol. 4 #21 (2007)

Haunted, Part 1
Two Initiative agents in Nebraska check out what is thought to be a false alarm, only to find that Graviton is holed up in a run down building off the beaten path. He injured one agent and kills another before being taken back into custody. Stark is trying to deal with this and with Maya Hansen's apparent suicide, while convincing the new Secretary of Defense that the attacks made before World War Hulk hit were being led by the Mandarin.
Release Date: 2007