题目内容：
回答题Bad behavior incockpit has proven deadly
Terrifying incidents of bad pilot behavior like a JetBlue pilot'smeltdown this week are not unprecedented in the history of commercial aviationand have sometimes caused deadly crashes.
Nevertheless, the list of incidents resulting from unprofessionalpilot behavior over a 50-year history and millions of flights show that"it's a very rare thing," says aviation safety expert Aaron Gellmanof the Kellogg
School of Management at Northwestern University. "And evenwith what's happened in the past, it's the safest mode of transportation byfar."
Tuesday's JetBlue incident, where the FBI alleges captain Clayton Ｏsbon started Speaking nonsense tohis first officer and was later tackled and restrained by passengers, isextremely unusual. But airline procedures, which require two pilots and lockedcockpit (驾驶座舱)doors, protected the public, Gellmansays.
Some previous incidents of bad behavior by pilots have been fatal,showing that airline procedures cannot save lives when pilots choose to ignorethem.
On Feb. 12, 2009, Colgan Air Flight 3407 iced up and crashed inBuffalo, N.Y., after a series of mistakes by tired pilots, according to theNational Transportation Safety Board. Both the captain and first officer had traveledfor hours before taking controls of the plane in Newark, and the young firstofficer, Rebecca Lynne Shaw, was heard on the flight recorder saying she hadlittle experience dealing with icy conditions. When ice caused the flight tostall(失速)，captain Marvin Renslow erred and made the stall worse, crashing theplane and killing 50 people,according to the NTSB. The board also concludedthat Shaw and Renslow had been chitchatting in the cockpit.
"They weren't properly trained and weren't able to handle thesituation," Gellman says.
In 2008, an Air Canada co-pilot was forcibly removed from aToronto-to-London flight, restrained andsedated(给服镇静剂)after having a mental breakdown andspeaking to God while behind the controls at 30,000 feet. The plane landed safelyin Ireland.
Ｏn Oct. 31, 1999, Egypt Air Flight 990 crashed into the AtlanticOcean off the Massachusetts coast due,according to the NTSB, to the deliberateaction of first officer Gameel Al-Batouti. The Boeing 767 crashed with dozensof Egyptian military officers aboard who were returning from helicopter flighttraining in the USA at a time when the Egyptian government was at war withradical Islamists. Al-Batouti, an Islamist sympathizer, "wanted to get ridof the helicopter pilots and crashed the airplane," Gellman says.
Ｏn Oct. 14, 2004, two pilots taking an empty airliner from LittleRock, Ark., to Minneapolis decided to explore the limits of their PinnacleAirlines plane. Captain Jesse Rhodes and first officer Peter Cesarz took the planeto 41,000, the maximum approved altitude for the plane, and then failed tofollow proper procedure when the plane stalled and the engines shut down,according to the NTSB; After trying unsuccessfully to restart the engines whilegliding, they crashed behind several homes 2.5 miles from an airport. Bothcrewmembers were killed.
A 1956 mid-air collision that investigators blamed on pilotstrying to give passengers better views of the Grand Canyon resulted in arevamping(改写)of the role of the Federal Aviation Administration (FAA．in patrolling the airways.
The pilots were maneuvering around cloud formations over thecanyon and collided, killing 128 people."It was a watershed(分水岭) event because it changed thewhole approach to air traffic control," Gellman says. Congress reacted byincreasing funding for the FAA, giving it the capability to monitor aircraft"in the airways not just in the terminal," Gellman says.
Investigations of deadly accidents over the years have resulted insafety procedures, such as requiring two pilots and locking cockpit doors,which helped preserve lives in the JetBlue incident, Gellman says.
"Even if the captain had insisted on making trouble in thecockpit, I think the first officer would have been able to handle it,"Gellman says. "That's why we have two people in there."
Dave Funk, a retired Northwest Airlines captain now an aviationconsultant with Laird & Associates, says the JetBlue flight might have beensaved by the co-pilot, who barred an incapacitated (不胜任的 ) Ｏsbonfrom the cockpit. "The first officer recognized the gravity of thesituation and solved the problem," Funk says.
The co-pilot's quick thinking on that flight is analogous tocaptain "Sully" Sullenberger landing a US Airways flight on New York'sHudson River with no lives lost, Funk says. "We gave him a bunch of brokeneggs.
He made scrambled eggs. He didn't make eggs over medium. "
Funk says pilots today face more worries than they did years ago,when airlines like TWA and now-defunct Pan Am projected an image of employees who have"this wonderful life, have great benefits, fly around the world,fall inlove, all in their 20s. "
Instead, he says, pilots today are dealing with "the crappyeconomy, the political fights each day. Is Washington going to get attackedThat's going to create stress. "Pilots, in particular, have to deal with alot more stresses in their job because of the intense security situation,Funksays.
"It's the greatest job in the world when you get to the endof the runway," Funk says. "All the crap you have to get through to make it to therunway doesn't make it worth it to a lot of us anymore."
Tuesday's JetBlue incident is __________. A．an incident of unprofessional pilot behavior
B．the major cause of a plane crash
C．an example showing that the air travel is still the safest mode oftransportation by far
D．an example showing how the airline proceduresprotect the public
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