Devastating earthquakes have killed at least 3,700 people and flattened hundreds of buildings in Turkey and Syria. The frantic search for people trapped under the rubble, the difficulty crews will face in accessing Syria, and what residents who have become homeless will now endure in the middle of winter. Plus, the aid the Turkish government is requesting from Canada and other countries, and whether Ottawa can grant it. And while Turkey has dealt with earthquakes before, these latest tremors to rattle that nation have caused an overwhelming amount of destruction. We'll look at the science behind the severity.