Airport security concern is a major issue in today's world. Laptop, with 6 letters, is one of the items that must be checked by security personnel at airports. Passengers are not allowed to carry laptops in their hand luggage and must place them in their checked baggage. Liquids, with 7 letters, is another item that must be checked by airport security personnel. Passengers are not allowed to carry liquids in their hand luggage and must place them in their checked baggage.