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.
The 25-year-old migrant, her husband and their 4- and 7-year-old children had nothing left at home in Venezuela. They already had trekked the perilous Darien Gap jungle dividing Colombia and Panama and criminal groups that prey on migrants like them.
