Relay: Teams of four compete in a four-part race, 4x7.5km (30km total) for men and 4x6km (24km total) for women.
When Apophis buzzes the Earth on April 13, 2029, it will come within 19,400 miles (31,300 km) of our planet.
The walkers will now be driven to the second checkpoint, 112 km from the South Pole.
Abbreviation of kilometer
The country code for Comoros.