LAS VEGAS, Nev. -- Lines are moving much more swiftly at McCarran International Airport on Friday, evidence that passengers are better prepared for emergency bans on nearly all liquids for carry-on luggage. But officials still recommend that passengers arrive at the airport at least 3 hours before their scheduled departure.

Officials are still urging passengers to log on to www.tsa.gov for the latest information about what to expect regarding airport security. Passengers can also call the airport at 702-261-4990 for information about prohibited items and conditions at the airport. In addition, passengers can log onto www.flymccarran.com for the status of flight departures and arrivals.

In the aftermath of a foiled terrorist plot in Britain, passenger lines swelled Thursday at airports across the nation and McCarran, which typically hosts about 70,000 passengers a day and ranks as one of the 10 busiest airports in the world.

The electronic board that offers Arrivals and Departures information at McCarran showed few delays Thursday morning, but that picture may be deceiving; mounting delays at other airports across the country will likely cause even greater inconveniences for Vegas travelers as the day evolves, officials said.

"There are lines and I think, perhaps, everybody panicked and came too early to the airport," said airport spokesperson Elaine Sanchez, noting that there have been no specific threats to McCarran airport. "There are delays in the East Coast, which inevitably means delays here."

The ripple effect means passenger waits at McCarran will likely worsen beyond their situation Thursday morning, when lines for the C and D gates stretched so far they merged with lines for the A and B gates.

Officials said terrorists planned to mix medicine cabinet liquids and detonate them on international flights.

As a precaution, officials at McCarran and airports elsewhere distributed memos to all passengers detailing bans on carry-on items such as bottled water, toothpaste, shampoo, cologne, lotion and hair gel. It has yet to be determined whether the bans are simply temporary.

In addition, Transportation Security Administration (TSA) officers are inspecting baby formula and medicine before allowing it on board.

In some airports, computers and ipods have to be sent through with checked luggage.

U.S. Homeland Security has raised the threat level for flights from Britain to "red" -- the highest level ever. That designates a severe risk of terrorist attack.

All other flights -- including all U-S domestic flights -- are under an "orange" alert, the second-highest level of vigilance.