Please answer the following question: Question: What does Walter Dean want Bennett to use to declare the President incapable ? If there is no answer, please output "Insufficient information to provide an answer.". Movie title: Air Force One Context: The film begins with an American Special Forces unit capturing General Ivan Radek (Jurgen Prochnow), the dictator of Kazakhstan. Radek's regime had caused an enormous amount of bloodshed for Kazakhstan, and there was word that his stockpiling of nuclear weapons would have plunged the world into a second cold war. His capture was made through the joint cooperation of President James Marshall (Harrison Ford), and Russian President Petrov (Alan Woolf).Several weeks after the capture of Radek, President Marshall visits Moscow, along with his wife Grace (Wendy Crewson) and daughter Alice (Liesel Matthews). While Marshall is praised for his help in freeing Kazakhstan from Radek's grip, Marshall surprises everyone (including his own men) by deviating from his planned speech. Marshall says that they were too slow to act, and vows to not allow such a thing happen again.Marshall, his family, and his men are then returned to Air Force One, which takes off on its return trip to Washington D.C. Unknown to the President or anyone else, a rogue secret service agent named Gibbs (Xander Berkeley) has secretly allowed into the plane several men who are supporters of General Radek. Gibbs kills several agents in a crucial protective position on the plane and the hijackers, led by Egor Korshunov (Gary Oldman), don bulletproof vests and collect weaponry that is used by the Secret Service. Korshunov and his men quickly gain control of the plane, killing several Secret Service officers and capturing the 1st Lady and the president's staff. In the chaos, Marshall is ordered into an escape pod in the cargo hold.Air Force One's pilots attempt an emergency landing at Ramstein Air Base, but are soon killed with one of Korshunov's men taking control of the plane. A group of F-15's are sent after Air Force One as an escort. The plane is piloted towards Kazakhstan, and Korshunov places a direct call to the White House, where Vice-President Kathryn Bennett (Glenn Close) and Defense Secretary Walter Dean (Dean Stockwell) listen to Korshunov's...
A:
a satellite phone