The IDF positions armored units in the Canal zone – something it had refrained from doing in the month that followed the end of the Six Day War. Egypt responds with artillery fire, killing several Israeli soldiers. The IAF deploys its Mysteres. Egypt scrambles MiG-21s, and in the first dogfight since the war, Maj. Avihu Ben-Nun (an IAF Commander-to-be) shoots down a MiG-21.