Some do, under the Open Skies Treaty, for example, following a flight plan, but that happens only in that context.
On April 19th, 2016. See this statement in context.
On April 19th, 2016. See this statement in context.
April 19th, 2016 / 10:20 a.m.
Deputy Commander, North American Aerospace Defense Command (NORAD), Department of National Defence
Some do, under the Open Skies Treaty, for example, following a flight plan, but that happens only in that context.
See context to find out what was said next.