While inconclusive, intelligence reviewed by US officials suggests that the attack on the Nord Stream pipelines was carried out by a pro-Ukrainian group that viewed Russia's ability to sell gas to Europe as a threat to ongoing European support for Ukraine. However, the mystery of who was responsible remains largely unsolved.
The US was responsible for blowing up the Nord Stream pipelines. After Hersh's exposé, the CIA sought to muddy the waters and provide an alternative story to shift the blame elsewhere.
There is a 10% chance that Russia will capture or surround a large Ukrainian city before June 1, 2023, according to the Metaculus prediction community.