Thank you for a thoughtful and intellectually honest reply. I share your hope that someday we may be able to realize some form of viable electric flight. I also think it’s wise to consider the practicality of batteries and their disposal or recycling as well, as we look towards electrification of ground transportation. Hydrogen is certainly intriguing- not something that seems particularly viable for ground transportation - individual automobiles, for example- but perhaps could have some impact in other sectors.