THE CONTEXT19 Russian drones entered Polish airspace on September 9 forcing the temporary closure of several airports. The Cipher Brief: Let’s talk about this week’s Russian drone incursion into Poland, whether you believe it was an accident on Moscow’s behalf or a calculated probe, how significant of an event was this? There are now also Ukrainian drones that run into the Russian drones, and again, hundreds of these are out there every night. And to see, again, the continued American commitment in eastern Poland and elsewhere, and the air commitment to what is going on in response to the Russian drone incursion, is very encouraging. General Petraeus: I'm keen to hear from European and NATO leaders about how much this drone incursion has galvanized additional action.