We really need to figure out how to stop a killer asteroid, scientists say

Imagine if scientists found out that a massive asteroid was on a collision course with Earth and would strike somewhere near Los Angeles by September 2020. What could humanity do?

Not much. At least, that was the result of a day-long tabletop exercise coordinated by NASA and FEMA late last month. In their hypothetical scenario, the space agency concluded that the 330-foot space rock was approaching too quickly to mount a deflection mission. The team from FEMA was left to figure out how to evacuate millions of people from Southern California.