Secret until now, stealth helicopters may have been key to the success of the Osama bin Laden raid. But the so-far-unexplained crash of one of the modified Black Hawks at the scene apparently compromised at least some of the aircraft’s secrets.
The two choppers evidently used radar-evading technologies, plus noise and heat suppression devices, to slip across the Afghan-Pakistan border, avoid detection by Pakistani air defenses and deliver an assault team of two dozen Navy SEALs into the al-Qaeda leader’s lair. Photos of the lost chopper’s wrecked tail are circulating online — proving it exists and also exposing sensitive details.
US President Barack Obama traveled on Friday to the home base, at Fort Campbell, Kentucky, of the elite Army pilots who flew the daring mission. They are members of the 160th Special Operations Aviation Regiment, nicknamed the Night Stalkers.
The reason one of the helicopters crash landed at the bin Laden compound has not been disclosed, but Daniel Goure, a defense specialist at the Lexington Institute think tank, said on Friday it might be explained by the unusual aerodynamics resulting from the aircraft’s modifications.
“It could be much more difficult to fly, particularly at slow speed and landing than you would expect from a typical Black Hawk,” Goure said.
DIFFICULT
The US military’s first stealth aircraft, the now-defunct F-117 fighter jet, was notoriously difficult to handle in flight, officials have said.
Night Stalker pilots also fly other, publicly acknowledged versions of the Black Hawk that are specially equipped with advanced navigation systems, plus devices allowing for low-level and all-weather flight, day or night. Those are rigged to permit occupants to “fast rope” from the helicopter as it hovers just off the ground — a technique used in the bin Laden assault.
Many aspects of stealth technology have been known for decades, including the use of angled aircraft edges and composite materials to make aircraft less visible on radar. The Army began a program to build a new class of helicopter with stealth technology in 1992. Known as the RAH-66 Comanche, it was canceled in 2004, in part to speed up development of drone aircraft.
Bill Sweetman, editor-in-chief of Defense Technology International and a long-time student of stealth aircraft development, said the biggest secret behind the stealth helicopter is simply that it existed.
“There was obviously a fairly high risk that you were going to compromise it one way or another the minute you used it,” he said in an interview.
The decision to use the helicopters reflected the extraordinary stakes involved in eliminating bin Laden, the world’s most-wanted terrorist. It is not known whether the choppers have been used in earlier Special Operations raids, but Dick Hoffman, a former Navy SEAL and now a defense analyst at the Rand Corp think tank, said he had never before heard of their existence.
Hoffman said in a telephone interview that the apparent stealth technology on the choppers boosted the raid’s chances for success.
“Getting into the target area undetected is hugely important, especially with these terrorist targets and militia targets,” he said.
He added that the SEAL team did not arrive at the Abbottabad compound in Pakistan in complete silence, since a resident in the same town was writing on Twitter during the raid that he could hear one or more helicopters and wondered what was happening.
NOISE SUPPRESSION
However, the modifications that suppressed noise from the helicopters — including the use of extra blades in the tail rotor and placement of a hubcap-like cover on the rotor — may have been sufficient to allow the assault teams to get on the ground before bin Laden and his security guards could mount enough of a defense to slow the SEALS; only one of the defenders was said to have gotten off a shot.
Noise suppression, Goure said, is “a huge advantage in these kinds of strikes.”
Some elements of that noise suppression technology were visible in photos of the tail section that was left behind. The main body of the helicopter was blown up by the SEALs before they left with bin Laden’s body, apparently in order to prevent the exposure of other secret stealth components.
A Pentagon spokesman, Marine Colonel David Lapan, declined to say on Friday whether Pakistan was resisting US efforts to retrieve the remains of the chopper.
Sweetman said it was remarkable that the SEALs managed to swoop into the compound and catch the bin Laden party by surprise.
“They’re probably expecting that someday they could get a visit from [US] Special Forces,” he said.
“But they would also be expecting to hear helicopters for a few minutes before they arrive overhead. If your first warning is that you hear the thing and then you look up and it’s right there, you’ve lost valuable time,” he said.
Republican US lawmakers on Friday criticized US President Joe Biden’s administration after sanctioned Chinese telecoms equipment giant Huawei unveiled a laptop this week powered by an Intel artificial intelligence (AI) chip. The US placed Huawei on a trade restriction list in 2019 for contravening Iran sanctions, part of a broader effort to hobble Beijing’s technological advances. Placement on the list means the company’s suppliers have to seek a special, difficult-to-obtain license before shipping to it. One such license, issued by then-US president Donald Trump’s administration, has allowed Intel to ship central processors to Huawei for use in laptops since 2020. China hardliners
A top Vietnamese property tycoon was on Thursday sentenced to death in one of the biggest corruption cases in history, with an estimated US$27 billion in damages. A panel of three hand-picked jurors and two judges rejected all defense arguments by Truong My Lan, chair of major developer Van Thinh Phat, who was found guilty of swindling cash from Saigon Commercial Bank (SCB) over a decade. “The defendant’s actions ... eroded people’s trust in the leadership of the [Communist] Party and state,” read the verdict at the trial in Ho Chi Minh City. After the five-week trial, 85 others were also sentenced on
Conjoined twins Lori and George Schappell, who pursued separate careers, interests and relationships during lives that defied medical expectations, died this month in Pennsylvania, funeral home officials said. They were 62. The twins, listed by Guinness World Records as the oldest living conjoined twins, died on April 7 at the Hospital of the University of Pennsylvania, obituaries posted by Leibensperger Funeral Homes of Hamburg said. The cause of death was not detailed. “When we were born, the doctors didn’t think we’d make 30, but we proved them wrong,” Lori said in an interview when they turned 50, the Philadelphia Inquirer reported. The
RAMPAGE: A Palestinian man was left dead after dozens of Israeli settlers searching for a missing 14-year-old boy stormed a village in the Israeli-occupied West Bank US President Joe Biden on Friday said he expected Iran to attack Israel “sooner, rather than later” and warned Tehran not to proceed. Asked by reporters about his message to Iran, Biden simply said: “Don’t,” underscoring Washington’s commitment to defend Israel. “We are devoted to the defense of Israel. We will support Israel. We will help defend Israel and Iran will not succeed,” he said. Biden said he would not divulge secure information, but said his expectation was that an attack could come “sooner, rather than later.” Israel braced on Friday for an attack by Iran or its proxies as warnings grew of