The Department of Homeland Security increased airport and air travel security measures in response to a foiled plot by extremists to blow up aircraft bound from the United Kingdom to the United States. The same measures apply to people traveling on any Air Mobility Command-chartered aircraft, a command spokesman at Scott Air Force Base, Ill., said. AMC follows Transportation Security Agency guidelines, the spokesman said. As part of the new measures, passengers are not allowed to carry aboard any kinds of liquids or gels, including beverages, hand and suntan lotions, toothpaste, hair gels, creams or similar items. Passengers can carry medications, but must have a prescription with a name that matches the name on the airline ticket. They also can carry insulin and other essential non-prescription medicines. And parents can bring aboard baby formula, breast milk or juice.