Alleged assassin Luigi Mangione has shared the 27 things he’s grateful for after spending his 27th birthday in jail. TMZ have reprinted an electronic communication from the Metropolitan Detention Center Brooklyn, where Mangione is imprisoned after being charged with the Dec. 4, 2024, murder of UnitedHealthcare CEO Brian Thompson. Mangione says he is grateful for the MDC mail room for processing “thousands” of letters sent to him from 40 countries. “I spend each day between the same four walls of my unit,” Mangione writes. “The monotony of my physical environment is offset by the variety and richness of the lives I experience through letters.” Mangione also praises his cellmate J for “tolerating the clutter of all my…..