Both Country US and Mexico Agreed to Some Migration.
Venezuela are suffering from Health Crisis.
UN urged to declare full-scale crisis.
Some six million people have left Venezuela in the past five years.
Peoples are walking thousands of miles along dangerous routes to try to reach the US-Mexico border.
flights will be arranged for 24,000 migrants to arrive in the United States.
Those people who arrive illegally will be sent back to Mexico.
Until now most Venezuelans who crossed into the US were not turned back