9/11 is significant for the United States because a gang of militant high-jackers attacked the World Trade Center in New York and the Pentagon in Washington on that day.
According to the Muslim League's "two-nation thesis," India was divided into two "factions," Hindus and Muslims. It was for this reason that it sought Pakistan, a separate homeland for Muslims. As a result, what was previously known as 'India' was partitioned into two countries: 'India' and 'Pakistan.'