"They had something to prove and they proved it," "They proved they were good Americans."

VOA: standard.2009.11.04

It has previously proved difficult to prove national jurisdiction because pirate attacks usually take place in international waters.

BBC: Captain 'tried to escape pirates'

The more I tried to prove him wrong about Detroit, the more I proved him right.

CNN: Investors find real estate gold in Detroit

That's not something the government has proved, but Clement said they could prove it in court if asked.

NPR: Padilla Appeals His U.S. Captivity