But the site of the crash was far from the border with the Communist North.
Reunification won't come before radical political changes transform the Communist North.
The communist North defeated the South in Vietnam during the war there.
The South has triumphed in the economic contest with the Communist North.
The Communist North has slipped into totalitarianism and poverty.
"How can we expect 'free elections' to be held in the Communist North?" Diem asked.
The action is in support of South Korean efforts to improve relations with the Communist North.
Organizers had invited 20 people from the Communist North's tiny, suppressed Catholic population of about 50,000, but church officials said they never received a response.
And they allow the Government to jail critics they charge with helping the Communist North.
His power base was significantly strengthened by 900, 000 refugees, many of them Catholics, who had fled the communist North during the 300-day free-passage period.