​​If a Russian link is proved, it would be a significant moment for Nato, which is already on a heightened state of alert. At the same time, it is a reminder how far new and relatively inexpensive Russian drones can reach. Russian Gerberas, the $10,000 decoy drones that flew into Poland, are generally considered to have a maximum range of around 370 miles (enough to reach Copenhagen from Kaliningrad). Even if there is no Russian link to the Copenhagen incident, the sudden boldness of the Kremlin in Poland and Estonia is new territory for Nato. Though a Russian link cannot be confirmed in this case yet, the possibility has to be considered.