New York ( CNN ) -- Some families of 9/11 victims are outraged over the National September 11 Memorial Museum 's decision to charge admission for visitors . Sally Regenhard , assistant chairwoman of the group 9/11 Parents and Families of Firefighters and WTC Victims , called the fee a `` slap in the face '' on Sunday . `` Patriotic people from all corners of the country go to teach their children something and show respect , and now they will be faced with this fee ? It is outrageous , '' she said . `` This feeds the idea of New York City being money-hungry . It is taking advantage of tourists , '' Regenhard said . `` Making people pay to grieve is going to prevent people from paying their respects and learn about the victims . '' 9/11 Memorial communications manager Anthony Guido said that an exact price has not yet been set , but it will range from $ 20 to $ 25 . Family members of 9/11 victims are exempt from all memorial-museum fees and charges , Guido said . The museum will open in 2014 . According to Guido , 9/11 museum officials looked to other institutions in the country for guidance on admission charges , such as the Oklahoma City National Memorial & Museum , which charges $ 12 for adults . The memorial-museum declined to comment on Regenhard 's statements . But not all family members of 9/11 victims agree with Regenhard . Charles Wolf told CNN affiliate WCBS : `` I think if it 's necessary , they need to do it , because I want this museum to be good . We 've taken a horrible , horrible disaster -- in which my wife was lost -- and we 're making it better . '' CNN 's Morgan Winsor contributed to this report .
National September 11 Memorial Museum will charge admission . The admission charge will range from $ 20 to $ 25 , memorial spokesman says . Score: 7 If the fee is necessary , `` they need to do it , '' surviving husband says .