The Washington Post tracks developments in the imprisonment of Chinese dissident Jiang Yanyong: Chinese military and security officials are forcing the elderly physician who exposed the government's coverup of the SARS epidemic to attend intense indoctrination classes and are interrogating him about a letter he wrote in February denouncing the 1989 Tiananmen Square massacre, according to sources familiar with the situation. The officials have detained Jiang Yanyong, 72, a semi-retired surgeon in the People's Liberation Army, in a room under 24-hour supervision, and they have threatened to keep him until he "changes his thinking" and "raises his level of understanding" about the Tiananmen crackdown, said one of the sources, who described the classes as "brainwashing sessions." But Jiang, who became a national hero last year after blowing the whistle on the government's efforts to hide the SARS outbreak, has refused to back down, and said in a recent note to his family that he would continue to "face the problems confronting me with the principle of seeking truth from facts," according to a person close to the family.