First lady Michelle Obama visits the vertical garden of the United States pavilion at the 2015 Expo near Milan, Italy, in June.
First lady Michelle Obama visits the vertical garden of the United States pavilion at the 2015 Expo near Milan, Italy, in June. Antonio Calanni The Associated Press
First lady Michelle Obama visits the vertical garden of the United States pavilion at the 2015 Expo near Milan, Italy, in June. Antonio Calanni The Associated Press