FILE Britain’s Prince Harry or just plain Captain Wales as he is known in the British Army, at the British controlled flight-line in Camp Bastion southern Afghanistan, Oct. 31, 2012. Prince Harry alleges in a much-anticipated new memoir that his brother Prince William lashed out and physically attacked him during a furious argument over the brothers’ deteriorating relationship. The book “Spare” also included incendiary revelations about the estranged royal’s drug-taking, first sexual encounter and role in killing people during his military service in Afghanistan, (John Stillwell, Pool Photo via AP, File) Bereaved boy, troubled teen, wartime soldier, unhappy royal —...