An emotional ceremony has been held in New York, where United States President Barack Obama unveiled the new museum dedicated to the September 11 attacks of 2001.

The museum opens its doors to the public on Wednesday. Located in the footprint of the former World Trade Center, it cost $700m to build.

Among those attending the ceremony were the families of victims and first responders.

Al Jazeera’s John Terret reports.

Source: Al Jazeera