1/ The investigation into the suspected Russian covert operation to incentivize such killings has focused in part on an April 2019 car bombing that killed three Marines as one such potential attack, according to multiple officials familiar with the matter.

https://www.nytimes.com/2020/06/29/us/politics/trump-russia-plot-afghanistan.html

2/ U.S. officials have confirmed. The Taliban claimed responsibility for the attack. The U.S. military corrected on Tuesday its initial report on the incident, saying an Afghan contractor working with the U.S. forces and initially reported dead was in fact alive.

https://www.cbsnews.com/news/afghanistan-us-troops-killed-ied-bagram-air-base-today-2019-04-08/

3/ Zalmay Khalilzad, the U.S. envoy who is set shortly to hold his latest round of talks with the Taliban, called the consensus a “milestone” in efforts to end the war after he met Russian and Chinese representatives in Moscow.

https://www.thedefensepost.com/2019/04/27/us-russia-china-agree-afghanistan-troop-withdrawal/

something doesnt sit right.. if the US felt that Russia backed Taliban was involved in IED hits, why would the US hold peace talks..