just made me wonder if this was an alteration in the timeline, wouldn't the relativity (or other time ship at the federation's dispense in the future) had jumped back to try and stop this? or could it be that in the timeline that created that future with that ship, this event had to have happened so in their view this was the correct timeline and needed to happen. stands to reason that if the federation had become aware of time travel tech earlier they would have been able to "perfect" it more by the time the relativity was to be built. it's not like this event would be out of the scope of the relativity as they don't seem to be affected by the changes in timeline when they occur.