Many pop-up art installations depicting small children curled up underneath foil survival blankets in chain-link cages were captured in New York City, U.S., June 12, 2019. /VCG Photo

“No Kids in Cages” is a project helmed by RAICES, a Texas-based nonprofit organization that provides legal services for immigrants. /VCG Photo

It aims to demonstrate detained children at the U.S. and Mexico border. The cage also pipes out sound recordings done at detention centers. /VCG Photo

As of Wednesday afternoon, most of such unauthorized art installations have been taken away by police. /VCG Photo