How are pearl harbor and 9/11 different

While both are tragedies caught by surprise, there are distinct differences between the two. The first is the culprit behind the tragedies. The bombing at Pearl Harbor was a surprise attack on the West Coast of the US organized by Japan. 9/11 was a surprise attack when planes flown by members of an Islamic terrorist group crashed into the twin towers and the Pentagon. Hope this helps!

Pearl Harbor, in Hawaii, the site of a major US naval base, a surprise attack happened in 1941, by the Japanese killed over 2,000 people. This brought us into WWII. 

9/11 is when the Muslims hijacked three planes, two crashed into the Twin Towers in New York and the other crashed into the Pentagon.  9/11 were some of the deadliest attacks. Nearly 3,000 people died.