Labour gears up for new battle - on nuclear arms

By Elizabeth Piper LONDON (Reuters) - The leader of the main opposition Labour Party says a reshuffle of his top team has brought the unity needed to "win elections and change our country for the better" - but he faces a struggle to convince his own lawmakers. Some Labour MPs say this month's changes by Jeremy Corbyn have merely deepened divisions and herald the start of a battle over national security that could tear the party apart and leave it out of power for more than a decade. After days o