The U.S. government used an 18th-century wartime law to deport more than 200 Venezuelan immigrants earlier this month to El Salvador, where they were immediately transferred to the country's maximum-security gang prison.

Homeland Security Secretary Kristi Noem on Wednesday visited the El Salvador's CECOT mega-prison, where Venezuelans the Trump administration alleges are gang members were deported to from the U.S. Why it matters: The administration's decision to defy a court order and deport the 238 Venezuelans and subsequent legal battle marks a test in the limits of President Trump's hardline immigration enforcement powers.

Relatives and attorneys seek answers about the men sent to the high-security prison as the Venezuelan government calls for their return.