Former first ladies (L-R) Barbara Bush, Johnson, Betty Ford and Nancy Reagan pose at the Botanic Garden Conservatory in Washington in this May 11, 1994 file photo. Former U.S. first lady, Lady Bird Johnson, has died in Texas at the age of 94, less than two weeks after leaving hospital, a family spokeswoman said on July 11, 2007. REUTERS/Mannie Garcia/Files (UNITED STATES)