United Airlines Flight 175 took off from Boston Logan Airport at 8:14 a.m. with brothers Hamza al-Ghamdi and Ahmed al-Ghamdi strapped into business class seats 9C and 9D.
Thirty minutes later the al-Ghamdis and three others took control of the plane, killing two pilots and stabbing members of the flight crew in the process. At 9:03 a.m., the aircraft slammed into the South Tower of the World Trade Center.
The effects of that day have been permanently seared into the national consciousness. But before the al-Ghamdi brothers helped kill thousands on September 11, they spent their last four nights sleeping, and waiting, at the Charles Hotel in Cambridge and at a Days Inn less than a mile from Harvard Stadium.
During the three months the pair spent in America—mostly in Florida—they didn’t attract attention. They had already trained in Afghanistan. Now, they had to wait.
"They dressed and acted like Americans, shopping and eating at places like Walmart and Pizza Hut. They came into different cities, moved around a lot and did not hold jobs," FBI Director Robert S. Mueller III said about the 19 hijackers, speaking before Congress.
During their time in the U.S., the al-Ghamdis had gym memberships, went to Kinko’s, paid for dry cleaning, shopped at Winn-Dixie, and bought blazers, dress shirts, and shoes.
In the four days they spent in Cambridge and Boston, the brothers kept a low profile, spending mostly cash. This picture of the al-Ghamdis’ time in Cambridge—which comes from documents cataloguing the FBI’s investigation into the hijackers—is incomplete. But through interviews and by examining phone and financial records, the FBI established a number of details.
At the Charles, they called fellow hijacker Marwan Al-Shehhi from the hotel room and pay phone outside. Al-Shehhi, the youngest of the 19 hijackers, was a hijacker with pilot training—making him a de facto leader of the Flight 175 team.
After the two brothers spent the night at the Charles—known for hosting visiting politicians and celebrities—the al-Ghamdis searched for a cheaper hotel, leaving behind a room that overlooks the Harvard Kennedy School.
According to FBI documents, the brothers rode in a taxi cab for nearly 45 minutes, looking for a more affordable place to stay. At one point, they called the Inn at Harvard to inquire about rates. Ultimately, they opted to spend the last three nights of their lives at a Days Inn.
The Days Inn, which is flooded with Harvard families during Commencement season, is 1.5 miles from Harvard Yard.
The al-Ghamdi brothers spent their time meeting with other soon-to-be-hijackers, eating at the Charles River Bar and Grill, and, at one point, ordering a pornographic movie for $12.55, according to FBI records.
On Sept. 10, the day before the attacks, the al-Ghamdis brothers followed a detailed plan for spiritual preparation in their hotel room—the same plan the other hijackers, positioned near airports on the east coast, undertook.
At 1:30 p.m. that day, housekeeping knocked on the door to room 241 for a routine cleaning. Refusing cleaning service, Hamza al-Ghamdi instead handed a maid two full trash bags. An hour later, housekeeping knocked again, and this time, the brothers allowed hotel staff to clean the room.
A maid recalled seeing three men in the room, Hamza al-Ghamdi, Ahmed al-Ghamdi, and another man, also a hijacker.