CO:
"Why are you traveling for such a short duration?"
"No check in luggage? why?"
DL:
after asking me how long I was in that country.. I was asked
"Are you sure?"
and all of these:
Originally Posted by
frink
What electronics do you have in your bags?
Originally Posted by
spainflyer
Do you have anything in your luggage that could look like a weapon?
Sometimes they will then offer examples: knives, scissors, nail clippers

Originally Posted by
driscj
Did you buy anything in the airport?