"The United States was not the only target of this broader programme," Secretary of State Antony Blinken said. "We've learned a lot about these balloons and how to track them," Gen Ryder said, adding that the US was now confident it had the ability to be "on the look-out for these kinds of capabilities". The US believes that balloons have operated over US territory on at least four occasions, but Gen Ryder did not give further detail on these instances