The Trump administration is barring the Yemeni mother of a 2-year-old boy with a rare brain disease from visiting her dying son in California one last time. Doctors have put Abdullah Hassan on life support and say the boy will not survive much longer. Abdullah and his father, Ali Hassan, are both U.S. citizens, but the boy’s mother, Shaima Swileh, is a Yemeni citizen who now lives in Egypt. Under the Trump administration’s travel ban—which was upheld by the Supreme Court in June—people from five majority-Muslim countries—Iran, Libya, Yemen, Syria and Somalia—are barred from entering the U.S. The family is seeking a waiver for Swileh so she can visit her son in a hospital in Oakland, California. Ali Hassan told the San Francisco Chronicle, “All she wishes is to hold his hand for the last time.”