If you see something that is unusual to you, you're better off telling someone about it. I was inspired to write this post because a fellow blogger Bianca decided to write about a man who fell down at Los Angeles Airport, and he later died. Of course someone yelled for help, but it was too late.
Anyways that's just one example.
You should be weary and fully aware of your surroundings:
You should tell someone, a transportation worker or law enforcement agency if anything appears suspicious.
1. A person is in distress and needs medical attention due to (i.e. Dehydration, stroke, heart attack, etc.)
2. Unlawful activities such as a robbery.
3. A package or container that is unattended.
Among other things, there are thieves that stage distractions so that others may steal your belongings, be careful of those too.
Pickpockets do occur without warning, you're better off carrying bags with zippers on them and if you have to, use a combination lock to secure your personal belongings.