Alonso flyes on Leclerc's car from behind to front, halo do nothing, check videos, not pictures taken from the front angle.
The worst thing about Halo is what people say, it looks like since the put the Halo on the car, every single crash is FATAL for the driver and he's alive because of the HALO, why? because people don't understand that until today the halo was useless, and today it was useless too, so they try to prove that the Halo es the best thing on the F1 for safety, so tell me, why F1 2017 cars that was the same fast and crash a lot, there was no Dead Driver? and today every single crash "oh he's alive because of the halo, without the halo he'll be probably dead".
Sry about the bad english