Unless it actually strikes, no country is going to escalate an overflight to a different hot strike. Air powers regularly fly along the borders and intrude and

Unless it actually strikes, no country is going to escalate an overflight to a different hot strike. Air powers regularly fly along the borders and intrude and have for the last 70 years. Overflights were deemed acts of war during the cold war as well - that's why the USSR tried to shoot down all of the U-2 planes they could (ultimately succeeding on Gary Powers' flight) and any other things they considered spy flights (such as the KAL-007 crisis). At no point did they escalate in other areas. War is hell, and countries go to great lengths to avoid it - even when they're angry.