Migrants who have been marching in a caravan heading north enjoy water sprayed from a hose, in Huehuetan, in the state of Chiapas, Mexico, Sunday, Oct. 24, 2021. Migrant-rights advocates and aid workers travelling with the caravan estimate there could be 1,000 children among the estimated 4,000 people trudging along the highways under a punishing sun. (AP Photo/Marco Ugarte)