Mexico

Immigration

Homeland Security Secretary Nielsen is the latest departure of the Trump Administration

Homeland Security Secretary Kirstjen Nielsen has resigned at President Trump's request. This comes development comes after Trump's frustration with illegal immigrants and asylum seekers at the Mexican border, which prompted him to recently threaten to close the border. Nielsen oversaw many of Trump's most controversial immigration policies, including family separations at the border.

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Environment

Saving the sharks

Sharks may be fearsome predators, but over fishing threatens their survival. The World's Julia Kumari Drapkin profiles an unusual pair of shark researchers. One has always wanted to protect sharks. The other used to kill them.

Mexico's crime problem

At least 1,000 people have been killed in Ciudad Juarez, just south of El Paso, in drug gang battles just this year. Houston Chronicle reporter Dudley Althaus has been reporting on the violence and tells Lisa Mullins that this year's crime level is unprecedented.