However, despite pressure and threats from the Soviets, the Polish commission stood by its findings; finally, Soviet engineers and politicians reluctantly accepted responsibility. Soon after the crash, LOT Polish Airlines, still being unable to purchase non-Soviet aircraft, implemented several improvements in the Il-62s' construction:   After the crash, the place where Flight 5055 came down and exploded was — during three months of cleanup — ploughed and sown with new trees. As of 2016, the long scar in the forest is still perfectly visible from the air. On the south edge of the scar is a monument – a high, black Christian cross and a black stone engraved with the names of the crash victims. In Ursynów district there is a Zygmunt Pawlaczyk street, and through Kabaty Forest runs a grove of trees named for the "Kościuszko". Symbolic graves of the crew members lie in Powązki Military Cemetery, and a collective grave of unidentified victims lies in Wólka Węglowa Cemetery – the place where the victims were identified. Some identified victims were also buried there; others were buried in their home towns. The Warsaw to New York route was operated by the IL-62 until 1989 when the first Boeing 767 was introduced and later replaced by the Boeing 787 in 2012.