U.S. Marines and sailors insert into a landing zone as part of a scenario while conducting riverine training during UNITAS-Partnership of the Americas 2012 on Camp Blanding, Fla., Sept. 8, 2012. The event gives the participating troops from Brazil, Canada, Chile, Colombia, Ecuador, Mexico, Paraguay, Peru, the United States and Uruguay an opportunity to exercise critical thinking based on realistic scenarios, reinforce essential tactics and techniques.