In the final episode Terminator: The Sarah Connor Chronicles season 2, when Cameron meets John Henry, he is asking Cameron "Will you join us?" After that John Connor finds Cameron's body but her chip and John Henry are missing. In the display screens a message is showing for John Connor that says "I'm sorry John".
So why did Cameron give her chip to John Henry. The chip had all the information about John Connor. Did John Henry travel to the future with Cameron's chip?