Welcome to hell. The US has flown more than 250 accused migrant gang members to El Salvador — where they will be sent to a notorious mega-prison. The flight included 238 members of the Venezuelan prison gang Tren de Aragua,

The U.S. Secretary of State thanked El Salvadorian President Nayib Bukele for taking in more than 200 alleged gang members in its 40,000-inmate prison for the "low cost" of $6 million.

Temperatures inside the cells can soar to a sweltering 95 degrees during the day, with no additional ventilation to provide relief.