No incidents had occurred at 10km (30,000 ft) cruising altitude. The highest aircraft shot down until then was at 6.3km (below 20,000 ft), which is why the 10km cruising lanes were still deemed safe (a judgement error, according to today&#x27;s report).<p>The report also notes that in the previous days, over &quot;61 airlines from 32 states&quot; crossed over Ukraine without incident. On the day of the incident, 160 flights were recorded. So apparently, 61 airlines flew over a self-declared war zone. I&#x27;m sure some of them must have been considered sane.