Passage: President Lyndon B. Johnson was in the Oval Office that evening, planning a meeting in Hawaii with Vietnam War military commanders. After press secretary George Christian informed him at 8:20 p.m. of the assassination, he canceled the trip to focus on the nation. He assigned Attorney General Ramsey Clark to investigate the assassination in Memphis. He made a personal call to King's wife, Coretta Scott King, and declared April 7 a national day of mourning, on which the U.S. flag would be flown at half-staff.

Question: Whom did George inform of an assassination?
Lyndon B. Johnson