The cockpit voice recorder began recording the final 30 minutes of Flight 93 at 09:31:57. At this moment, it recorded Jarrah announcing, "Ladies and gentlemen: here the captain. Please sit down, keep remaining seating. We have a bomb on board. So sit." The controller understood the transmission, but responded, "Calling Cleveland center, you're unreadable. Say again, slowly." The cockpit recording captured Dahl moaning and Jarrah telling him in English to sit down and to stop touching something (presumably the controls); Jason Dahl's wife, Sandy Dahl, listening to the cockpit voice recorder, commented that Jarrah "was fussing at my husband...he was speaking in English, and he spoke Arabic anytime he was talking with the other hijackers. Jason made moaning sounds after that. It sounded like he was trying to mess with stuff or get up, because the hijacker pilot kept telling him to stop and to sit down."A woman, presumably first-class flight attendant Debbie Welsh, is heard being held captive in the background and is heard struggling with the hijackers and pleading, "Please, please, don't hurt me". Unable to engage the autopilot, Jarrah turned the plane and headed east at 09:35:09. The aircraft ascended to 40,700 feet (12,400 m) and air traffic controllers immediately moved several aircraft out of Flight 93's flightpath. The woman in the cockpit is heard to say, "I don't want to die, I don't want to die" before being killed or otherwise silenced, followed by one of the hijackers saying in Arabic, "Everything is fine. I finished."At 09:39, two minutes after Flight 77 impacted the Pentagon, air traffic controllers overheard Jarrah say, "Ah, here's the captain: I would like you all to remain seated. We have a bomb aboard, and we are going back to the airport, and we have our demands. So please remain quiet." Air traffic controllers did not hear from the flight again. Passengers and crew began making phone calls to officials and family members starting at 09:30 using GTE airphones and mobile phones. Altogether, the passengers and crew made 35 airphone calls and two cell phone calls from the flight. Ten passengers and two crew members were able to connect, providing information to family, friends, and others on the ground.Tom Burnett made several phone calls to his wife beginning at 09:30:32 from rows 24 and 25, though he was assigned a seat in row 4. Burnett explained that the plane had been hijacked by men claiming to have a bomb. He also said that a passenger had been stabbed with a knife and that he believed the bomb threat was a ruse to control the passengers. During one of Tom Burnett's calls, his wife informed him of the attacks on the World Trade Center and he replied that the hijackers were "talking about crashing this plane. ... Oh my God. It's a suicide mission." He began asking her for information about the attacks, interrupting her from time to time to tell the others nearby what she was saying. Then he hung up. He ended his last call by saying, "Don't worry, we're going to do something." An unknown flight attendant attempted to contact the United Airlines maintenance facility at 09:32:29. The call lasted 95 seconds, but was not received as it may have been in queue. Flight attendant Sandra Bradshaw called the maintenance facility at 09:35:40 from row 33. She reported the flight had been hijacked by men with knives who were in the cabin and flight deck and had stabbed another flight attendant, possibly Debbie Welsh.

Question: When did he finished?
Answer: 09:39