Flight safety and airport security are once again in the headlines after two men crashed an SUV loaded with gas cylinders into Scotland's Glasgow International Airport.
The web site of the U.S. Transportation Security Administration (TSA) states that "there is nothing to suggest attacks in the U.K. indicate an [impending] attack in the U.S. However, many airports and mass transit systems in the United States are increasing their security presence as a precaution."
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The TSA notes that travelers may see an increased use of bomb-sniffing dogs, increased presence of law enforcement and/or TSA security staff in public areas, and random security checks on all vehicles.
The TSA asks travelers to be aware of their surroundings and to notify a security or law enforcement officer if they see anything suspicious.
The TSA's flight safety rules about bringing liquids on board planes remain in effect.
"Travelers may now carry through security checkpoints travel-sized toiletries (3 ounces or less) that fit comfortably in one quart-size, clear plastic, zip-top bag," states the TSA's web site on flight safety.
At the security checkpoint, "travelers will be asked to remove the zip-top bag of liquids and place it in a bin or on the conveyor belt," the TSA notes.
"In addition, larger amounts of prescription liquid medications, baby formula, and diabetic glucose treatments must be declared at the checkpoint for additional screening," states the TSA.
But don't try to go through an airport security checkpoint with a large cup of coffee or a big bottle of water. Those items aren't allowed through security but can be bought at airport shops near your departure gate.
"After clearing security, travelers can now bring beverages and other items purchased in the secure boarding area on-board aircraft," states the TSA.
According to the TSA,'s flight safety rules, items currently permitted in carry-on bags include:
All prescription and over-the-counter medications (liquids, gels, and aerosols) including KY jelly, eye drops, and saline solution for medical purposes
Liquids including water, juice, or liquid nutrition or gels for passengers with a disability or medical condition
Life-support and life-sustaining liquids such as bone marrow, blood products, and transplant organs
Items used to augment the body for medical or cosmetic reasons such as mastectomy products, prostheticbreasts, bras or shells containing gels, saline solution, or other liquids
Gels or frozen liquids needed to cool disability or medically related items used by persons with disabilities or medical conditions.
Passengers can carry as much of those items as they want in their checked baggage. But if the medically necessary items exceed 3 ounces or are not contained in a one-quart, zip-top plastic bag, passengers must present those items for inspection at the security checkpoint.
"All disability-related equipment, aids, and devices continue to be allowed through security checkpoints once cleared through screening," states the TSA.