UGANDA has detained an American national for involvement in subversive activities, amid a deadly crackdown against opponents of longtime President Yoweri Museveni that has drawn growing international censure. In a brief statement on its Facebook account, Uganda Police said it had arrested the American, Guy Smith, in a town in the country's west on Sunday. He was detained "for his alleged involvement in anti government subversive activities. He remains in custody at...as inquiries continue. Any new information will be communicated accordingly," the statement said. Police gave no further details. In an email, a U.S. State Department official said the government…