Great video explainer: Vint Cerf on ICANN and NTIA
http://boingboing.net/2014/07/24/great-video-explainer-vint-ce.html

Simple Overview of ICANN and the IANA Transition by Vint Cerf
http://www.circleid.com/posts/simple_overview_of_icann_and_the_iana_transition_by_vint_cerf_animated/

Regards!!

Mamadou