Clinton did not directly answer how she would react if a Russian plane breached a no-fly zone established by the U.S.

Nor did Clinton address the Syrian casualties that might result from a no-fly zone. In a 2013 speech to Wall Street firm Goldman Sachs, Clinton told attendees that establishing a no-fly zone would “kill a lot of Syrians,” because it would require the U.S. to take out Syrian air defenses, which are located in populous areas.