the russian mobsters he was investigating. perhaps someone who thought he was a traitor for working with british intelligence. since november 2006 litvinenko s widow marina has been asking how big was the conspiracy? who was behind it? s h how high did it go? dangerous questions, as she knows better than anyone. you think you play chess, but they play russian roulette. reporter: those who were closest to litvinenko believe the kill order may have come e from the very top because rd litvinenko picked a fight with the wrong person from his past. none other than russian president vladimir putin. sasha was on a mission. he was trying to prove that putin is as corrupt as anybody in post-communist russia. reporter: the mission may have started years before when litvinenko made that flow chart of corruption in the fsb.
i spoke to three women that were coming in from los angeles, they were here visiting mexico, as tourists and when they heard about this protest, they decided to join in as u.s. citizens in support of mexico, but i asked them if they felt at any point that they were not being woman come e welcomed or anti-u.s.entiment expressioned to them, they said no, that s not the case. we re seeing these protests play out right here in the city. dozens more across the country, all of them anti-trump. fredricka? leila santiago reporting from mexico city, thank you so much. these protests driven by the president s executive action to build a wall along the u.s./mexico border and his immigration ban. up next, how president trump could impose a new travel ban and the potential impact of that around the world. plus one stage dealing with an alarming spike in overdoses, that is a state rather, 52 calls in just 32