They also possessed a surplus of something that is vanishing from many other parts of American life: humility.

CNN: From Marine Corps to Peace Corps

After vanishing from her home in 1997, Sabrina Aisenberg's whereabouts remain a mystery.

CNN: STORY HIGHLIGHTS

For years, she had tried in vain to make sense of that moment of farewell, but all she could recall was two heads bobbing before vanishing under the boat, the linked arms of two other friends, and a wave from Meimei, the youngest of the six, as she sank beneath the surface.

NEWYORKER: Alone