It was only Mr. Casper's persistence that made it possible to challenge Google's data collection practices.

CNN: Put teeth in Google privacy fines

The only thing that can be counted on is the persistence of power, whether on Wall Street or in Washington.

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It was a shocking start for a team seeking only a second win in nine league games, but halfway through the first period their persistence paid off as they grabbed the equaliser.

BBC: Birmingham 2-2 Manchester City