A small California boy taps his white cane against the street from the  sidewalk. He cannot see the one small step he is about to make — a step that,  for him, is truly a giant leap.

"I can do it," he says, his voice unsure yet hopeful.

He steps down onto the pavement with his right leg and the left soon  follows: a leap of faith, an example of courage.

Gavin Stevens, a completely blind 4-year-old, accomplished that feat for the  first time last week outside his school in Ontario, Calif., about 35 miles east  of Los Angeles.

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