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<div id='article-page'><div id='article-content' data-media-url='//news-app-staging.s3.amazonaws.com' data-base-url='//news-app-staging.herokuapp.com' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/A.wav' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='US Navy Cancels Development of High-Tech Railgun Weapon' data-article-id='5736'><script src='//news-app-staging.herokuapp.com/javascripts/getscripts.js'></script><link rel='stylesheet' href='//news-app-staging.herokuapp.com/stylesheets/article.css' type='text/css' /><div class='article'><p><span data-start-time='0' data-end-time='13854'>The U.S. Navy is halting development of a high-tech weapon designed to fire projectiles at up to seven times the speed of sound.</span> <span data-start-time='13854' data-end-time='23771'>The Navy spent more than 10 years developing the weapon, called an electromagnetic railgun.</span> <span data-start-time='23771' data-end-time='34688'>The cannon-like railgun uses electricity instead of chemical substances to fire projectiles.</span> <span data-start-time='34688' data-end-time='52479'>A report released earlier this year by the Congressional Research Service stated that the Navy had been developing the railgun as a firing weapon to support U.S. Marines operations. </span> <span data-start-time='52479' data-end-time='63750'>The report said the development also centered on possible use of the railgun as a missile defense system.</span> <span data-start-time='63750' data-end-time='81292'>The move to cancel railgun development comes as the U.S. Department of Defense turns its attention to the development of hypersonic missiles, The Associated Press reports.</span> <span data-start-time='81292' data-end-time='93542'>Hypersonic is a term that relates to speeds of more than five times the speed of sound, also known as Mach 5. </span> <span data-start-time='93542' data-end-time='109000'>In addition to flying at extremely high speeds, hypersonic weapons are designed to move in ways that make them difficult to find and destroy in flight.</span> <span data-start-time='109000' data-end-time='126542'>The U.S. military has been putting money into the development of hypersonic weapons in recent years in an effort to keep up with hypersonic military programs in China and Russia.</span> <span data-start-time='126542' data-end-time='134625'>Matthew Caris is a defense expert with the private advisory company Avascent Group. </span> <span data-start-time='134625' data-end-time='141625'>He told the AP that “the railgun is, for the moment, dead.”</span> <span data-start-time='141625' data-end-time='153271'>The halt in railgun development, Caris said, suggests that the Navy saw difficulties in implementing the technology. </span> <span data-start-time='153271' data-end-time='165521'>In addition, the Navy likely recognized that hypersonic missiles have higher performing abilities than the railgun, he added.</span> </p></div><div class='control-buttons-sticky' style='display:none;'><div class='control-buttons'><button title='Back' class='back' disabled='disabled'></button><button title='Play' class='play' disabled='disabled'></button><button title='Pause' class='pause' style='display:none;'></button><button title='Forward' class='forward' disabled='disabled'></button><button class='finished-reading' style='display:none;'>Done</button></div></div></div><div id='article-media'><div id='media-image'><img src='https://news-app-production.s3.amazonaws.com/articles/5193/A.jpeg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=17710 data-hint-location='0' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/what_is_a_projectile.wav'>What is a projectile?</div><div class='choices' data-correct-choice='a missile designed to be fired from a rocket or gun'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/an_object_that_is_used_to_project_rays_of_light.wav'><span>an object that is used to project rays of light</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/a_school_assignment_undertaken_by_a_student_or_group_of_students.wav'><span>a school assignment undertaken by a student or group of students</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/a_missile_designed_to_be_fired_from_a_rocket_or_gun.wav'><span>a missile designed to be fired from a rocket or gun</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/a_thin_rectangular_slab_of_baked_clay_concrete_or_other_material.wav'><span>a thin rectangular slab of baked clay, concrete, or other material</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=17711 data-hint-location='81292' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/what_is_an_other_term_for_mach_5.wav'>What is an other term for Mach 5?</div><div class='choices' data-correct-choice='hypersonic'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/hypersonic.wav'><span>hypersonic</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/superfluous.wav'><span>superfluous</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/hydrophilic.wav'><span>hydrophilic</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/zoom.wav'><span>zoom</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=17712 data-hint-location='13854' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/the_navy_spent_more_than_10_years_developing_the__blank__called_an_electromagnetic_railgun.wav'>The Navy spent more than 10 years developing the <span class='blank'>weapon</span>, called an electromagnetic railgun.</div><div class='choices' data-correct-choice='weapon'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/dinner.wav'><span>dinner</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/flag.wav'><span>flag</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/weapon.wav'><span>weapon</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/5193/jump.wav'><span>jump</span></div></div></div><div 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