Are children crossing border refugees? In the decades since the world reached a consensus on the treatment of refugees, their population around the globe has only become more crowded, their reasons for leaving more complex and the needs of countries trying to help them more challenging. Megan McKenna, Juan Cartagena and Lindsay Jenkins join to discuss the recent wave of immigrant children crossing the southern border of the U.S. and why they should be considered refugees.

Melissa Harris-Perry on msnbc