On December 7, 1941, just before 8am, the naval base at Pearl Harbor was attacked. The attack led to the United States' formal entry into World War II the next day. A total of 188 U.S. aircraft were destroyed; 2,403 Americans were killed and 1,178 others were wounded.
In order to find this cache, you will need to complete the lab cache A Date Which Will Live In Infamy located at the Pearl Harbor National Memorial. Entry to the Pearl Harbor National Memorial is free, and is open from 7am to 5pm.
You can validate your puzzle solution with certitude.