Answer:
Front doors have canine officers, security check has metal detectors and x-rays for bags and the planes have air marshals to prevent terrorist attacks
Explanation:
I hope that helps good luck!:)
School courses, Uni programs or from independent artists that are fluent the field you want to pursue. First try to observe if one is available in your area, if not, then the internet is your friend.
Answer:
Because the earth is so large that smaller things like the floor, or even a whole city appear to be unchanged when you look at it, but from a large distance, namely space it is most definetely round.