What happened on September 11, 2001? Al-Qaeda ended American involvement in Middle Eastern countries.

The US military found Osama bin Laden, the leader of al-Qaeda.

The United States invaded Afghanistan to locate a terrorist group that was hiding in the country.

The terrorist group al-Qaeda hijacked four American airplanes, two of which were flown into the World Trade Center in New York City.

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is: