+ View the NASA Portal      America’s First Satellite   Download flash plugin at http://www.macromedia.com/go/getflashplayer   If you cannot see the video please download the latest Flash plugin. Now Playing An overview of Explorer 1, the first U.S. satellite. Download options Quicktime: Small (9Mb):    + Narrated with caption    + Narrated without caption   Large (44Mb):    + Narrated with caption    + Narrated without caption Related movie:    + Launch of Explorer 1                + Freedom of Information Act     JPL Historian: Erik Conway Site Manager: Susan Watanabe Webmasters: Tony Greicius, Martin Perez