A doctoral student from Chicago's Adler School of Professional Psychology is still missing, despite the efforts of the US government, a private company specializing in rescues and 280 other volunteers and police. The Red Cross is supervising the effort. Daniel Gimelfarb, 28, has been missing in a Costa Rican national park since Aug. 11. His parents arrived Aug. 13 to lead the rescue mission. According to the Sun-Times, Gimelfarb spoke fluent Spanish and was in good physical condition when he left. more ›