Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Lt. Col. Robert Hite, one of the three remaining Doolittle Raiders, died after a battle with Alzheimer's disease on Sunday, aged 95 One of the last surviving Doolittle Raiders who attacked Japan during a daring World War II mission has died, age 95. Lt. Col. Robert Hite died on Sunday at a nursing home in Nashville after a battle with Alzheimer's disease. He was one of three remaining Doolittle Raiders. Hite was a co-pilot of a crew that flew one of the 16 B-25 bombers that raided Tokyo in April 1942. Led by Lieutenant Colonel James 'Jimmy' Doolittle, the mission saw 80 airmen sent in bombers from a carrier at sea to attack military targets in Japan.Lt. Col. Robert Hite died in Nashville after a battle with Alzheimer's diseaseHe was a co-pilot of a crew taht flew one of the 16 B-25 bombers that raided Tokyo in 1942The air raid gave Americans hope in the wake of Pearl HarborTwo of the original 80 Doolittle's Raiders are alive today, both in their 90s 
 Question:Though the attack only caused scattered damage, it's credited with boosting morale in the United States while shaking Japan's confidence less than five months after the country attacked _.

Pearl Harbor