Final answer:
The American attitude about the war in Europe during World War II shifted from neutrality to support for the Allies following the attack on Pearl Harbor.
Step-by-step explanation:
The American attitude about the war in Europe during World War II was initially one of neutrality. The United States wanted to avoid getting involved in the conflict, but as the war progressed and Nazi Germany posed a threat to global security, the American attitude shifted to support for the Allies. Following the attack on Pearl Harbor in 1941, the United States officially entered the war and the American attitude became one of steadfast commitment to defeating the Axis powers.
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