Just to add to the history of today:

The Doolittle Raid, conducted on April 18, 1942, was an air raid by the United States Army Air Forces on Japan during World War II. Led by Lt. Col. James H. Doolittle, the specially modified B25 Mitchell bombers, were launched from the carrier USS Hornet (CV-8) and targeted military and industrial sites in Tokyo and other cities, marking the first American air operation to strike the Japanese homeland.

The raid aimed to, and did, inflict both material and especially psychological damage on Japan following the attack on Pearl Harbor, boosting American morale and demonstrating that Japan was vulnerable to American air attacks.

It also re-energized the Imperial Japanese Navy’s plan to assault and invade Midway Island, some historians saying that it caused Admiral Yamamoto to so hasten implementing the operation, the IJN didn’t fully prepare for it.