Earlier, four opposition groups - including Mr Belaid's Popular Front - announced that they were pulling out of the country's constituent assembly in protest.

BBC: Tunisia political crisis deepens after assassination

With that stroke of his pen, Governor Perry made Texas the first state in the country to require by statute the well-by-well public disclosure of all the constituent chemicals, compounds and water volume contained in frac fluids.

FORBES: Why the Texas Disclosure Law Really Does Work