Giant signs in Miami ask senator to enact gun control

"Slaughtered in school...And still no gun control?...How come, Marco Rubio?" is the message distributed across the sides of three trucks on their way to the senator's office, as part of a campaign promoted by the Avaaz activist group and backed by other organisations, Efe reported.

"Many mothers who are crying today for their children would have made these signs. Today we wanted to bring that conversation into the streets, since Rubio represents a political class that still hasn't answered any of our questions," Avaaz spokesman Oscar Soria said.

The project is inspired by the movie "Three Billboards Outside Ebbing, Missouri," about a mother who asks police, on three enormous signs, to give her an explanation for the rape and murder of her daughter.

Three signs were used in a similar fashion by Avaaz, whose President, Emma Ruby-Sachs, slammed the senator's "toothless response to the shooting, calling it 'inexplicable.' We call that 'inexcusable.'"

"Florida has very lax gun laws. Rubio has been supported by the NRA (Natonal Rifle Association) and has never tried to reform those laws. He's one of the senators who has received the most contributions from the NRA, besides having an A-plus rating with that association," Ruby-Sachs said.

"Over the past year there were 334 mass shootings, yet there has been no new federal gun law since 1994," she said.