The 9/11 memorial museum has launched an annual membership program to help sustain and develop its programming and exhibits.

The National September 11 Memorial & Museum is slated to open next spring.

Membership offers various benefits, including unlimited yearly admission to the museum for one adult. It also offers a 10 percent discount at the gift shop and cafe.

Individuals who sign up before April 1, 2014 can save 10 percent. That comes to $63 for individuals and $225 for a family membership.