Yarelis Bonilla, a 5-year-old girl from Elizabeth, N.J., is suffering from a severe form of leukemia. Doctors say that the only way Yarelis will survive is if she receives a bone marrow transplant from a perfect match. For Yarelis that perfect match is her sister, Giselle.

Unfortunately, due to a complicated family matter, Giselle lives in El Salvador. She has been denied a visa to come to the United States on several occasions, and experts say that the transplant must be performed here.