Human rights activist Nguyen Quoc Quan, 2nd from left, is welcomed by his wife Huong Mai Ngo, left, sons Khoa, 2nd right, 20, and Tri, 19, 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, 2nd from left, is welcomed by his wife Huong Mai Ngo, left, sons Khoa, 2nd right, 20, and Tri, 19, 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, 2nd from left, is welcomed by his wife Huong Mai Ngo, left, sons Khoa, 2nd right, 20, and Tri, 19, 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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