America has developed a secret military capability using both existing drones such as the Global Hawk and Raptor and a newer class of stealth drones based on the RQ180 first seen when captured by Iran some years ago.
This is important now with America announcing its withdrawal from the INF treaty. Signed in 1987, the INF or Intermediate-Range Nuclear Forces Treaty, covered weapons, at the time guided missiles only, with ranges from 500 to 5,500 kilometers.
It is important to note that, at the time the US and Soviet Union signed, no other nation had this type of capability or even a perceived need. There were no real US tensions with China and, as things are today as well, the intermediate range nuclear missiles of both India and Pakistan are, it is assumed, aimed at each other only.
Today, things are different, or as Washington sees it, according to John Bolton, chief security advisor to President Trump. From Foreign Policy:
“Washington plans to withdraw from the INF Treaty, according to U.S. President Donald Trump, who says that Russia has violated the agreement for years. Coupled with the prospect of no extension to the Strategic Arms Reduction Treaty, Washington may thus be opening the door to a return of a terrifying past. The Trump administration is not just threatening to roll back a slew of protections and safety precautions; it is also quite consciously restarting the arms race, with a full nuclear modernization plan that could cost up to $1.6 trillion over 30 years, according to an October 2017 report from the Congressional Budget Office and other accounts. The Russians and Chinese will undoubtedly respond, but with the cessation of treaty-authorized inspections, governments will be far more in the dark about what the other side is building.