By Alexandra Alper and Nandita Bose WASHINGTON (Reuters) -President Joe Biden on Wednesday announced plans to reduce the death rate from cancer by at least 50 percent over the next 25 years, part of an effort to revive the “Cancer Moonshot” initiative to speed research and make more treatments available. The program, an Obama administration initiative led by Biden when he was vice president, also aims to improve cancer detection and prevention. Biden’s son Beau died of brain cancer in 2015 at age 46, something the president has said helps inform his and first lady Jill Biden’s passion for the …