The treatments, still experimental, are aimed at stopping the attacks at their source.

The goal: stopping the flow of cocaine at its source.

Other heroes stop the demons at their source.

If so, it was essential that it be stopped at its source.

The basic plan, to stop noise at its source, became reality.

The United States has a moral responsibility to help stop the drug trade at its source.

Officials said the effort could include a military action intended to stop the spill at its source in a Kuwaiti offshore terminal.

But we might be able to stop it at its source.

Control or stop the odour at its source.

Do whatever you can to stop or divert the water at its source.