Human rights activist Nguyen Quoc Quan with his wife Huong Mai Ngo and their sons Khoa, 20, and Tri, 19, speaks during a press conference after his arrival at the Los Angeles International Airport from Vietnam on Wednesday, Jan. 30, 2013, in Los Angeles. Quan has been released after being detained since April 17, 2012 in Ho Chi Minh City, Vietnam. (AP Photo/Ringo H.W. Chiu)

Associated Press
Human rights activist  Nguyen Quoc Quan with his wife Huong Mai Ngo and their sons Khoa, 20, and Tri, 19, speaks during a press conference after  his arrival at the Los Angeles International Airport from Vietnam on Wednesday, Jan. 30, 2013, in Los Angeles.  Quan has been released after being detained since April 17, 2012 in Ho Chi Minh City, Vietnam. (AP Photo/Ringo H.W. Chiu)
Human rights activist Nguyen Quoc Quan with his wife Huong Mai Ngo and their sons Khoa, 20, and Tri, 19, speaks during a press conference after his arrival at the Los Angeles International Airport from Vietnam on Wednesday, Jan. 30, 2013, in Los Angeles. Quan has been released after being detained since April 17, 2012 in Ho Chi Minh City, Vietnam. (AP Photo/Ringo H.W. Chiu)
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