Since Tessio, couldn't hang his hat in Brookly, I suspect he might have carried a gun for protection.
Why couldn't Tessio hand his hat in Brooklyn...I thought the meeting was on "Tessio's ground".
I think that's just an overdramatic statement Tessio made. No doubt that the Barzinis and Tattaglias were looking to expand on Corleone territory, but you don't just walk in and take over territory from New York's biggest family. That only happens during a conflict or by negotiation.
