Lasers could help ward off the dangers of lightning strikes

A take a look at involving big lasers shot from a mountaintop in Switzerland helps scientists develop methods to direct lightning. It could possibly be a primary step in repelling harmful strikes that result in loss of life and destruction. WSJ science reporter Aylin Woodward joins moderator Zoe Thomas to elucidate how the know-how works and when it is likely to be prepared for wider use.