Asylum from gang violence and opportunity to work are among the reasons cited in an article by Daniele Volpe and Kirk Semple of the New York Times as to why thousands of migrants from central and South America are making their way north.

“We’re traveling to find a better future for my daughters,” said Fanny Rodríguez, who was with her husband, Edil Moscoso, 26, and their two daughters Daily Edith, 2, and Yarice, 9 months old. “We’re not going because we want fancy things.”

She added: “I don’t have to give them luxuries, only what’s necessary — that my daughters don’t lack food, that my daughters don’t lack clothes. Things like that.”

With news of the growing caravan headed through Mexico, President Trump has tweeted about sending the military to the southern border of the United States. He also tweeted about the countries of Guatemala, Honduras and El Salvador.

“We will now begin cutting off, or substantially reducing the massive foreign aid routinely given to them,” Trump said.