Who can forget the images, telecast worldwide, of brave Chinese students facing down tanks in Tiananmen Square as they took on their Communist government? After a two-week standoff in 1989, military forces suppressed the revolt, killing many students and issuing arrest warrants for top student leaders, including Zhang Boli. After two years as a fugitive, Zhang -- the only leader to elude capture -- knew that he must bid his beloved country, as well as his wife and baby daughter, farewell. Traveling across the frozen terrain of the former Soviet Union, where peasants rescued him, and through...