**FILE** President Obama and first lady Michelle Obama greet Vietnamese President Truong Tan Sang and wife Mai Thi Hanh before the APEC leaders dinner in Honolulu on Nov. 12, 2011. (Associated Press)

Photo by: Charles Dharapak

**FILE** President Obama and first lady Michelle Obama greet Vietnamese President Truong Tan Sang and wife Mai Thi Hanh before the APEC leaders dinner in Honolulu on Nov. 12, 2011. (Associated Press)