U.S. officials drafting plans for a memorial park honoring its atomic bomb program in the 1940s say they will take Japanese sensitivities into account.

Officials from the Energy Department and the National Park Service told an event in Washington on Wednesday that they will try to strike a balance between promoting scientific advancement and the tragic impact of the Manhattan Project when choosing exhibits for the park, which will be spread across three sites.

While many in the United States see the 1945 attacks on Hiroshima and Nagasaki in a positive light, believing that they quickened the end of World War II, those cities have expressed concern that the planned Manhattan Project National Historic Park could whitewash the fact that the bombings killed more than 140,000 people, most of whom were civilians.