American intelligence had placed senior Taliban leader Qari Tahir in the Tangi Valley. Army Rangers launched a night operation to find him, and the mission progressed through the early hours as ISR aircraft tracked movement around the target compound. Apache helicopters engaged a group of eight Taliban fighters north of the compound, killing six. But as the operation unfolded, the Rangers needed reinforcement. A Quick Reaction Force was assembled aboard the Chinook: fifteen Navy SEALs from DEVGRU's Gold Squadron, two additional SEALs from Naval Special Warfare Group 1, Air Force pararescuemen and a combat controller from the 24th Special Tactics Squadron, Army aircrew, seven Afghan commandos, an Afghan interpreter, and a military working dog named Bart. The helicopter approached the landing zone alone, without external lighting, from the northwest rather than the southern route used in the earlier Ranger insertion.

Extortion 17 made its last radio transmission reporting it was one minute from the landing zone. The Chinook slowed and descended, following a steep valley where fighters had positioned themselves on both sides. Whether it was a lucky shot or a prepared ambush has been debated ever since. The official account from U.S. Central Command described a Taliban fighter who scored a fortunate hit with an RPG. A senior Afghan government official, speaking anonymously, offered a different version: Qari Tahir had fed false information to draw American forces in, and fighters waited along the only approach route. What is not disputed is the result. The RPG struck the aft rotor assembly, and the helicopter went down. An AC-130 gunship crew overhead had observed surviving insurgents and asked permission to engage before the Chinook's approach, but restrictive rules of engagement prevented them from firing. Air Force Captain Joni Marquez, the gunship's fire control officer, later said she believed the shootdown could have been prevented.

The loss surpassed the sixteen Americans killed in the 2005 downing of Turbine 33 during Operation Red Wings. Among the dead were some of the most experienced special operators in the American military, though they were from a different DEVGRU squadron than the team that had killed Osama bin Laden three months earlier. That proximity in time fueled conspiracy theories about leaked intelligence, though the Pentagon has consistently denied any connection. A flash flood swept through the crash site that afternoon, washing away portions of the wreckage. Early reports that flight recorders had been lost in the flood were incorrect; the CH-47D variant does not carry them. On August 12, PBS NewsHour anchor Jim Lehrer read the names and displayed photographs of all thirty Americans in silence, a rare departure from the program's format that conveyed the weight of the loss.

The insurgent who fired the RPG did not survive long. After the shootdown, he used a two-way radio to boast about the act. American signals intelligence aircraft intercepted the transmission and tracked him. Two days later, on August 8, an F-16 dropped four GBU-54 laser-guided bombs on the man, his accomplice, and four associates in the nearby Chak Valley, with an AC-130 gunship and two Apache helicopters following up. All six were confirmed killed. The broader reckoning proved more complicated. Investigations by CENTCOM and Congress concluded that the operational decisions were tactically sound, but the incident exposed tensions between aggressive rules of engagement designed to reduce civilian casualties and the need to protect American forces in hostile terrain. General Stanley McChrystal had tightened those rules in 2009, citing overreliance on firepower. Whether the restrictions contributed to the loss of Extortion 17 remains one of the war's most painful open questions.

The Tangi Valley lies in rugged terrain about sixty miles southwest of Kabul, a landscape of narrow ravines and steep ridgelines that made helicopter operations inherently dangerous. The valley had been contested ground for years, a place where insurgents could position themselves above approaching aircraft and where escape routes ran in every direction. Today the valley has returned to the rhythms that preceded the American presence. The war that brought Extortion 17 here ended in 2021, but the names of the thirty-eight people who died on that August night endure in memorial walls, military records, and the memories of families who learned in the middle of the night that their world had changed. The helicopter's call sign has become shorthand for the cost of a twenty-year war fought in places most Americans could not find on a map.