Mike, who was helped by a social start-up, fixes a bicycle
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Social start-up gives a helping hand

How a San Francisco social start-up is giving homeless people a helping hand

For some in San Francisco the tech boom has brought wealth, but the city also has one of the highest rates of homelessness in the United States.

Some in the tech community are trying to help including Hand Up, a company which is linking donors directly to members who need support.

The BBC's North America Technology Correspondent Richard Taylor reports.

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