Army investigator testifies he found chats between Manning, Assange on soldier's laptop

Pfc. Bradley Manning's court-martial over sending sensitive material to WikiLeaks has resumed with an Army investigator testifying about what he found on the soldier's personal laptop.

Army computer crimes investigator Mark Johnson testified Wednesday that he found evidence of chats between Manning and Julian Assange, who founded the anti-secrecy website WikiLeaks. Manning faces numerous charges, including aiding the enemy, which carries a potential life sentence.

Johnson also testified that Manning used the alias Nathaniel Frank, a historian who wrote a book critical of the military's "don't ask, don't tell" policy.

Manning's defense has said he was a naive but good-intentioned soldier whose struggle to fit in as a gay man in the military made him feel he needed to do something to make a difference.