News 9/11 Memorial Museum marks one-year anniversary of first opening (VIDEO) 9/11 Memorial Museum tribute timelapse On Friday, May 15, 2014, EarthCam released a look at the 9/11 Memorial Museum from 2004-2014. (Credit: EarthCam) By CAROLINE LINTON May 15, 2015 11:40 AM Print Share fbShare Tweet gShare Email The 9/11 Memorial Museum marked the first anniversary since its the first opening on Friday, May 15, 2015 with a time-lapse video of 10 years of reconstruction at Ground Zero. The video, first released in 2014, shows the rebuilding of the 16-acre site in Lower Manhattan through EarthCam. The 9/11 Memorial Museum opened on May 15, 2014 for families of victims, first responders and recovery workers affected by the terrorist attacks. It opened to the general public on May 21. By CAROLINE LINTON Share on Facebook Share on Twitter Comments Comments section is temporarily on hold. Here’s why.