With Iran's national football team set to be based in Tijuana, Mexico, for the upcoming World Cup, our reporters Laurence Cuvillier and Matthieu Comin travelled to the Mexican city known for being one of the most dangerous in the world. Until recently, this border city with the United States was the main crossing point for Mexican migrants seeking the American Dream. But with US President Donald Trump's return to power, everything has changed. Tijuana has become a dead end.