A US Navy (USN) Sailor mans the rails and renders honor to the Battleship ARIZONA (BB 39) Memorial as the Nimitz Class Aircraft Carrier USS RONALD REAGAN (CVN 76) pulls into Naval Station (NS) Pearl Harbor, Hawaii (HI). The REAGAN's first port visit to Hawaii comes in support of Operation UNIFIED ASSISTANCE, the humanitarian operation effort in the wake of the Tsunami that struck South East Asia on December 26, 2004

The attack on Pearl Harbor was a surprise military strike by the Imperial Japanese Navy against the United States naval base at Pearl Harbor, in the Territory of Hawaii, on the morning of December 7, 1941. The attack led to the United States' entry into World War II. Japan intended the attack as a preventive action to keep the U.S. Pacific Fleet from interfering with military actions the Empire of Japan planned in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and the United States. The attack commenced at 7:48 a.m. Hawaiian Time. The base was attacked by 353 Imperial Japanese fighter planes, bombers, and torpedo planes launched from six aircraft carriers. All eight U.S. Navy battleships were damaged. 2,403 Americans were killed and 1,178 others were wounded.

Aircraft carriers are warships that act as airbases for carrier-based aircraft. In the United States Navy, these consist of ships commissioned with hull classification symbols CV (aircraft carrier), CVA (attack aircraft carrier), CVB (large aircraft carrier), CVL (light aircraft carrier), CVN (aircraft carrier (nuclear propulsion) and CVAN (attack aircraft carrier (nuclear propulsion). The first aircraft carrier commissioned into the United States Navy was USS Langley (CV-1) on 20 March 1922.