will get past westminster, and if that happens it's really an open question in terms of what happens next. theresa may crossing this critical barrier in-terms of getting approval from the eu 27 for this deal, but getting it through westminster really is entirely another matter. >> right, a pivotal step today but still much uncertainty. thank you, erin mclaughlin live for us in brussels. we're learning more about the christian missionary who lost his life while trying to convert one of the world's last remaining isolated tribes. >> john allen cho wrote in his diary he tried to communicate with the members of the tribe on the tiny island even after he was shot. we get more about it from cnn's pablo sandoval. >> reporter: this is one of the oldest and most isolated tribes in the world and authorities say they're responsible for last week's killing of missionary