Prince Harry will be in for quite a change of company when he leaves his fellow brothers in arms in England, where he is training to become a helicopter pilot, and heads to the Big Apple next month for a series of charitable engagements. This will be the 24-year-old’s first appearance in the U.S. in an official capacity, and it is expected that thousands of his followers will anxiously follow his every move. Harry’s visit is tied to Sentebale, a charity supporting African AIDS orphans, which he established in his mother’s name. The most hotly anticipated event will be his participation May 30 in an exhibition game of polo; tickets for the match go on sale May 1 and are expected to sell out quickly. Proceeds are expected to net more than $150,000.