(LEFT TO RIGHT) Mayra Ornelas, phlebotomist with the Central California Blood Center in northwest Fresno, takes blood from donor Robert Corona (father to Spc. Marcos Corona’s ) while son Robert Corona Jr. and wife Sally stand nearby. Friends and comrades of Spc. Marcos Corona held a bone marrow registry and blood drive on Saturday. The bone marrow registry is one of three planned over the next two weeks in hopes of finding a match for Corona’s son Marcos who is battling leukemia. February 16, 2013 DIANA BALDRICA/THE FRESNO BEE