CNN's Anderson Cooper documents treacherous migrant trek through Darien Gap.

CNN journalists trekked through the treacherous Darien Gap, a remote, roadless, mountainous rainforest connecting South and Central America, with over 800 migrants from various countries. The journey begins with guides from a drug cartel in Colombia, and migrants run out of food and money in Panama, still thousands of miles away from the US border. The number of migrants crossing the Darien Gap is increasing, and there has been a seven-fold increase in children crossing the gap. The Biden administration has turned to Trump-era policies as it prepares for an expected surge of migrants, including a new proposed regulation that largely bars migrants who traveled through other countries on their way to the US-Mexico border from applying for asylum in the United States.