Any American helicopter secrets to be learned by Russia or China occurred during the bin Laden raid in Pakistan. One of the helicopters malfunctioned during that raid and only one helicopter returned with bin Laden body later disposed of at sea.
The American liter left in Afghanistan holds no special secrets. Trump is trying to say he has special connections with Russia and China that reveal a poor exit by the USA military. It is all nonsense.
What surprises me is that Trump isn’t protected in Moscow as every other Russian ally like Litvinenko and Yanukovych. They can’t be extradited.
But, Trump’s helicopter statement is just more lies.