NEW YORK - It has been 12 years since the Sept. 11 attacks, but the museum at Ground Zero is not yet complete.

The National September 11 Memorial Museum is a year and a half behind schedule, but is set to open this spring.

Images of the fallen and stories of their lives will grace the entry. Families have donated personal mementos as well.

More than 10 million people from 188 countries have visited the 9/11 Memorial since it opened in 2011.