They become sticky and harden into the shape of the letter C, like a sickle, a hand tool with a curved blade.

VOA: special.2009.12.16

"Make no mistake," "We will close Guantanamo prison which has damaged our national security interests and become a tremendous recruiting tool for al-Qaida."

VOA: standard.2010.01.05

"It has become a diagnostic tool that informs and guides our efforts as we seek to build a global partnership to combat modern slavery,"

VOA: standard.2009.06.16