Today, Vietnam marked the 50th anniversary of the fall of Saigon and the unification of the country under communist rule after decades of war.

But 50 years later, from the ashes, the U.S. and Vietnam now enjoy close relations, due in no small part to American veterans who sought to revive a country they once helped destroy.

Here's Nick Schifrin.

In Vietnam's capital today, a celebration of what they called a victory of justice,

with uniforms similar to those worn by communist North Vietnamese troops, or flyby by Russian jets.

And a parade led by the communist leader who defeated the United States and provided this

city's modern name.

But 50 years later, this Vietnamese leadership did not fight the war.

And this anniversary parade is not only about triumph,

but also reconciliation.

From a poor backward country ravaged by war

under embargo and isolation,

today Vietnam is deeply integrated

into international politics,

the global economy,

and the civilization of humankind.

For the U.S. April 30, 1975, was a day of disgrace.

The U.S. abandoned its embassy via helicopter.

The final moment of what's known here as the American War that killed as many as 3 million and drove millions more from their

homes.

But for Vietnam, April 30, 1975 was the first act of reunification.

North Vietnam and Viet Cong soldiers conquered Saigon and U.S. ally South Vietnam, ending

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