Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

Debris belonging to the A321 Russian airliner are seen at the site of the crash in Wadi al-Zolomat, a mountainous area in Egypt's Sinai Peninsula on November 1, 2015. International investigators began probing why a Russian airliner carrying 224 people crashed in Egypt's Sinai Peninsula, killing everyone on board, as rescue workers widened their search for missing victims. AFP PHOTO / KHALED DESOUKI        (Photo credit should read KHALED DESOUKI/AFP/Getty Images)
Debris belonging to the A321 Russian airliner are seen at the site of the crash in Wadi al-Zolomat, a mountainous area in Egypt's Sinai Peninsula on November 1, 2015. International investigators began probing why a Russian airliner carrying 224 people crashed in Egypt's Sinai Peninsula, killing everyone on board, as rescue workers widened their search for missing victims. AFP PHOTO / KHALED DESOUKI        (Photo credit should read KHALED DESOUKI/AFP/Getty Images)

    JUST WATCHED

    Egypt: Sinai's violent history

MUST WATCH

Egypt: Sinai's violent history

As authorities investigate Metrojet plane crash, CNN's Ian Lee examines Egypt's Sinai Peninsula, plagued with terrorist activities and violence ever since the overthrow of President Mubarak in 2011.

Egypt: Sinai's violent history

As authorities investigate Metrojet plane crash, CNN's Ian Lee examines Egypt's Sinai Peninsula, plagued with terrorist activities and violence ever since the overthrow of President Mubarak in 2011.