A United States (US) travel ban on Myanmar's army chief and three other top officers for their role in orchestrating a crackdown against Rohingya Muslims does not go far enough, a United Nations (UN) rights investigator said Thursday.The sanctions announced Tuesday were the strongest censure yet from a Western power since the army launched its offensive against the stateless minority in August 2017 following attacks on police posts.US Secretary of State Mike Pompeo said army chief Min Au