Without self aware you are NUTS to this world for their job, just believe in yourself for whatever u doing or given task by other good Samaritan but u dont know what behind it ..very clear so many msg for youngsters in the movies & some repeat msg in so many airport scenes always check your luggage,keep your eyes until u get out of airport any Nonense can happen..i'm telling (Real Case) you to u all the close situation happen in cross border checkpoints where when a person put a bag to other unknown travelers for washrooms but never turn around that few second police unit k9 stop at traveler & get caught for bring drug..U see here what happen...that what i mean be alert & self aware..ok