Factbox: How Obama will relax U.S. Cuba policy

(Reuters) - President Barack Obama moved on Wednesday to normalize diplomatic relations with Cuba, a shift the White House said was needed because the long-standing U.S. embargo against the communist-ruled island has failed to promote democracy and has hurt the Cuban people. Here are the key changes: DIPLOMATIC RELATIONS * The U.S. will open an embassy in Havana. * During the next six months, Secretary of State John Kerry will review Cuba's designation as a state sponsor of terrorism. * U.S