Nelson Mandela is Critical But Showing Improvement

7/22/2013, 10:52 a.m.
Nelson Mandela reads an advanced copy of his new book Nelson"“Mandela by himself" the authorized quotation book. The book was launched Monday, June 27 2011 at the Nelson Mandela Foundation in Houghton, Johannesburg. (Photo by Debbie Yazbek/Nelson Mandela Foundation).

(CNN) -- Former South African leader Nelson Mandela still is in critical condition but "shows sustained improvement," the office of South African President Jacob Zuma said Monday. Mandela, 95, has been hospitalized with a lung ailment since June.