He has been tried and convicted in Panama for murder, embezzlement, and corruption in absentia.
So far the scheme has been tried out among a couple of hundred Kenyan families.
That idea has been tried before in many parts of the world, but with little success.
Without huge government subsidies, vertical separation has been a failure everywhere it has been tried.
The idea of internet TV has been tried many times before but has never gone fully mainstream.
Encouraging local police forces to develop their own methods has often worked where it has been tried.
This idea has been tried multiple times in the past, and so far no success stories have emerged.
None of this should come as a surprise: bombing has been tried in the past, to little effect.
Harsher punishment has been tried, with tough minimum sentences introduced in 1997, but seems to have had little effect.
But he notes that a form of fiscal federalism has been tried already.
For those willing to examine the evidence objectively, this social experiment has been tried hundreds of time throughout human history.
The pill has been tried on two groups of around 90 women with positive results and "very few" side effects.
"It has been tried by quite a few Assembly Members I have met and they said it was painful, " she said.
The evidence from countries like Germany and Denmark, where wind power has been tried on a larger scale, is not encouraging.
Still, using lasers to enrich uranium has been tried and abandoned before.
Not new, I hear you say - that has been tried for years, all the way back to WebTV in the 1990s.
The challenge, when everything has been tried before, is to persuade consumers that what you are doing is in some way innovative.
Universal registration has been tried in several countries, most recently in Canada.
These bollards are something that we don't think has been tried before for this purpose, but they seem to offer a sensible solution.
And in an era when virtually every collar and hemline has been tried and revisited, pioneering designs increasingly hang on finding new textiles.
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So far this has been tried only in animals, but the results suggest that getting nearer the nerve fibres activates them more precisely.
This is the first time something like this has been tried across the entire executive branch and we are eager to solicit input.
Our base foundation around virtualization of Big Data has been tried around the world under the most pressing conditions and across applications and transactional systems.
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But Medicare costs are cut mainly by squeezing payments to hospitals, doctors and other health-care providers, a device that has been tried (and evaded) before.
Understand the office culture, the history, what has been tried before.
But South Korea is unlikely to want to apply any sort of real squeeze on North Korea over the nuclear issue until more negotiation has been tried first.
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