![File:The U.S. Military Academy mascot mule participates in a pep rally Dec. 13, 2013, at the Pentagon in Arlington, Va., in preparation for the annual Army-Navy football game 131213-D-EV637-077.jpg - Wikimedia Commons File:The U.S. Military Academy mascot mule participates in a pep rally Dec. 13, 2013, at the Pentagon in Arlington, Va., in preparation for the annual Army-Navy football game 131213-D-EV637-077.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/The_U.S._Military_Academy_mascot_mule_participates_in_a_pep_rally_Dec._13%2C_2013%2C_at_the_Pentagon_in_Arlington%2C_Va.%2C_in_preparation_for_the_annual_Army-Navy_football_game_131213-D-EV637-077.jpg/399px-thumbnail.jpg)
File:The U.S. Military Academy mascot mule participates in a pep rally Dec. 13, 2013, at the Pentagon in Arlington, Va., in preparation for the annual Army-Navy football game 131213-D-EV637-077.jpg - Wikimedia Commons
![Keeping it wild: how mules help preserve the last untamed places in the US | Environment | The Guardian Keeping it wild: how mules help preserve the last untamed places in the US | Environment | The Guardian](https://i.guim.co.uk/img/media/de6e53c02561ffc844a2369f5977b9e9236f39ae/0_90_4032_2419/master/4032.jpg?width=1200&quality=85&auto=format&fit=max&s=c83abcc0a0894cce16c6684f87bb0234)
Keeping it wild: how mules help preserve the last untamed places in the US | Environment | The Guardian
![File:Acting Deputy Secretary of Defense Christine H. Fox, center left, greets the U.S. Military Academy mascot mule during a pep rally Dec. 13, 2013, at the Pentagon in Arlington, Va., in preparation File:Acting Deputy Secretary of Defense Christine H. Fox, center left, greets the U.S. Military Academy mascot mule during a pep rally Dec. 13, 2013, at the Pentagon in Arlington, Va., in preparation](https://upload.wikimedia.org/wikipedia/commons/thumb/b/ba/Acting_Deputy_Secretary_of_Defense_Christine_H._Fox%2C_center_left%2C_greets_the_U.S._Military_Academy_mascot_mule_during_a_pep_rally_Dec._13%2C_2013%2C_at_the_Pentagon_in_Arlington%2C_Va.%2C_in_preparation_for_the_annual_131213-D-EV637-079.jpg/1280px-thumbnail.jpg)