Slightly OT, but I thought it interesting that Vito brought Tom to the Commission meeting to make peace with Tattaglia. It would seem that Vito still had some confidence in him at that point.
Not only that, but it would have been unthinkable for Vito to show up alone at that meeting, when everyone else had their
consigliere and possibly other advisers present. It would have made Vito look weak: one son dead, second son out of action in Vegas, third son being hunted in Sicily. Very bad strategic move if Tom hadn't been there.