The investigation into last year's deadly Jeju Air crash has made little progress in identifying its exact cause, even as of its first anniversary on Monday. The crash, which occurred at Muan International Airport in South Jeolla Province, claimed 179 lives when the plane collided with a concrete barrier. The Aviation and Railway Accident Investigation Board, the main body overseeing the investigation, was expected to release an interim report by the end of the year. However, the plan ran into strong opposition from the victims' families, who claim that the board conducted an “unreliable” investigation and rushed to announce its findings without clear evidence. In July, the board presented its initial findings to the families, saying that the pilot had mistakenly shut down the left engine, rather than the right, which was severely damaged by a bird strike. The board was scheduled to make its findings public, but canceled the plan after strong backlash from the families, who argued that it was attempting to shift responsibility onto the deceased pilot. The families also questioned the b