When Dayana Castro heard that the U.S. asylum appointment she waited over a year for was canceled in an instant, she had no doubt: She was heading north any way she could.

After US President Donald Trump dashed her hopes of gaining asylum in the United States, Arianne Dominguez joined hundreds of other migrants seeking refuge in Mexico instead.

Migrants in Mexico have found the U.S. asylum process on hold at the start of the new Trump administration. For some, that means retracing their steps back along the migrant trail, a process that can bring immense danger.