GOOD EVENING: Tonight's show opens with veteran war correspondent Michael Yon, reporting from Buenos Aires after his Okinawa travels, analyzing the four-year migration surge through the Darien Gap northward to the U.S.

GOOD EVENING: Tonight's show opens with veteran war correspondent Michael Yon, reporting from Buenos Aires after his Okinawa travels, analyzing the four-year migration surge through the Darien Gap northward to the U.S.

1927 Darien Gap