Hamza al-Ghamdi
On September 11 , 2001 , Hamza boarded United Airlines Flight 175 and hijacked the plane along with his brother Ahmed al Ghamdi and 3 other terrorists so that the plane could be crashed into the South Tower of the World Trade Center . 
<triplet> United Airlines Flight 175 <subj> September 11, 2001 <obj> point in time <subj> World Trade Center <obj> location