TOPSHOT - Central American migrants - mostly from Honduras - moving towards the United States in hopes of a better life, remain at a shelter near the US-Mexico border fence in Tijuana, Baja California state, Mexico, on November 21, 2018. - US troops stationed on the border with Mexico ahead of the expected arrival of a Central American migrant caravans can intervene to quell violence but will be armed only with batons, Defense Minister Jim Mattis said (Photo by PEDRO PARDO / AFP)