[quote]It seems like the Traveler had never been disabled before because it had always eluded the Hive. I figure it might have been attacked by the Hive and Vex at the same time, causing it to be disabled.[/quote] The traveler was attacked by rasputin. He wouldn't let the traveler leave us like it did to the fallen. So he killed it...in so much as an eternal being can be killed thus forcing it to give humanity even more power, so we could protect it's body while it recovers.