Can i drop off my luggage at the ticket counter?

I Have a flight from mexico city to Atlanta Georgia using southwest @ 2:45 p.m. Central time… I'm wondering if I can drop my bags off at the ticket counter like 5 or 6 hours before. I don't want to walk around the airport with all my luggage

Can I still become an airline pilot?

So, I'm 5ft and I wear glasses, but my prescription is very low, as in +0.25 and +0.5. I was told to be a pilot you need to be 5ft 2 at least, and you need perfect vision. Is this true?

Can you have two identical passports?

I'm an American expat living in Europe (primarily Germany) and one of the most annoying laws there's that I have to have my passport on me at all times. After a few years, the thing ends up all bent and mangled up, and hard to scan at passports.

Even worse, a week ago, I was near a swimming pool when a fight suddenly broke out, and someone was shoved hard and fell into me--which caused me to fall in the pool and ruin my passport.

Is it possible to order two identical passports--one for carrying around in public for identification purposes and the other to keep at home for flying so I can give something presentable to the immigration agents at the airports?

Do I Need A Letter Of Consent To Fly Internationally? (17 Years Old)?

I'm 17 Years old and planning to fly to England. I would purchase my own tickets, and also would have family greeting me in England. Would i need a Letter of Consent to fly?
The Airline i would be traveling with has Young Adults set as (12-15) So i would pass there.
Thanks for your help!

Added (1). I'm a UK Citizen, and also an American Citizen.

Can I Buy An International Flight at 17?

I'm 17 years old and looking to fly to the UK During my summer vacation, is it possible for me to buy a ticket and also fly alone? Would i need a consent letter saying that i'm allowed to fly? My family in the UK would also be greeting me at the airport. (I live in the US)