Kristi Noem ordered an immediate suspension of the Diversity Visa lottery following instructions from Donald Trump after investigators tied the Brown University suspect to the program and after shootings that killed two Brown students and an MIT professor.Authorities identified the suspect as Claudio Manuel Neves-Valente, a 48-year-old Portuguese national who police said was found dead of an apparently self-inflicted gunshot wound in a New Hampshire storage unit and whose movements were linked to a rental car with a concealed Maine tag.The Diversity Visa program, created in 1990 and awarding roughly 50,000 visas a year, will face legal challenges from immigrant advocates and legal experts who said Congress, not the executive, created the program and that winners must still pass security checks.