And the world's busiest airport is ...

It was a regular day at the world's busiest airport, complete with the messes and victories of everyday life. On August 28, CNN spent 24 hours at Hartsfield-Jackson Atlanta International Airport. See everything we found at CNN.com/ATL24.

Passengers wait for flights in the International Terminal.

The interior of a cargo plane is barren as it awaits loading at the airport's UPS facility.

Friends and family wait for Holly Houston in the arrivals lobby of the Domestic Terminal.

People ride an escalator near Concourse E.

Shannon Nevin, 4, waits with her family at gate A21 for a flight to Savannah, Georgia.

A view out the window on the upper level of Concourse D.

A server at One Flew South heads to the kitchen.

Tiffanie Barriere serves a drink behind the bar at One Flew South on Concourse E.

People pass through the Domestic Terminal atrium.

Sgt. Vito Wallace exits the elevator and heads into the Domestic Terminal atrium.

Mi Ja Choi sits in the atrium of the Domestic Terminal. Police say they don't know how she was injured. Repeated attempts to follow up with her or her family have been unsuccessful.

Medic 3 -- a 10-year-old ambulance -- sits outside Fire Station 32, next to the tarmac near Concourse A.

Passengers are reflected in the ceiling of the Domestic Terminal atrium.

A MAC Cosmetics trainee applies makeup to employee Ashley White.

Jodi Ferrill and her five children wait for a connecting flight to Denver.

A corkboard full of military patches and souvenirs is mounted to the wall of a Starbucks near a security checkpoint. Employees say troops who come through the airport offer the patches as a way of saying thanks, since the coffee shop won't let them pay.

William Talton cleans the baggage carousels.

A floor cleaner's power cable crosses the carpet.

A beagle named Vince helps customs officers with inspections.

Customs officers check the serial numbers of weapons that arrived on a flight from Johannesburg. It's hunting season in South Africa.

Officer Michael Payne, known as Goob, is a member of the Atlanta Police Department's Bomb Tech Squad.

Pipes, cables and pumps line the interior of a wheel well on a Southwest Airlines plane.

Delta First Officer Michael Maier does an external inspection of a Delta 777 plane.

The air traffic control tower offers a 360-degree view of the runways.

Inside the Federal Aviation Administration's Terminal Radar Approach Control, or TRACON, Ken Hunihan monitors the systems that air traffic controllers use, including radar antennas and communication towers.

Packages are sorted at the FedEx cargo facility.

A FedEx worker moves containers full of packages at the cargo facility.

Airport employees take part in the annual Foreign Object Debris, or FOD, removal walk.

Passengers take the escalator to ground transportation and baggage claim.

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• The United States is still home to world's busiest airport


• Worldwide air passenger numbers increased to 6.3 billion in 2013


• The top six airports in the world remained the same as last year


• Dubai jumped three spots to finish in seventh place

(CNN) -- It's probably no surprise to anyone who has flown through Atlanta that the city's airport is still the busiest passenger airport in the world.

Some 94.4 million passengers went through Hartsfield-Jackson Atlanta International Airport in 2013, a decrease of 1.1% from 2012, according to Airports Council International's latest passenger traffic results for 2013.

Beijing Capital International Airport was in second place with 83.7 million passengers in 2013, an increase of 2.2% over 2012.

London Heathrow Airport remained in third place with 72.4 million passengers, an increase of 3.3%, according to ACI, the worldwide association of airports.

Tokyo International Airport (Haneda), Chicago O'Hare International Airport and Los Angeles International Airport were in fourth, fifth and sixth places respectively, rankings that remained unchanged from 2012. Dubai jumped from 10th to seventh place with 66.4 million passengers last year and a 15% increase in traffic.

"With many major economies remaining in a fragile state, 2013 can best be characterized as a year of unstable recovery for the global economy," said Angela Gittens, ACI's director general, in a Wednesday press statement.

"Despite this challenging operating climate, worldwide traffic surpassed the 6 billion passenger mark in 2013," Gittens said. "This represents an enormous feat for the airport industry as we commemorate the 100th anniversary of commercial aviation in 2014."

Paris dropped from seventh to eighth place, Dallas/Fort Worth was ninth and Jakarta, Indonesia, was in tenth place.

#ATL24: Behind the scenes at the world's busiest airport

Passenger traffic grew around the world last year, with the world's airports serving 6.3 billion passengers in 2013, up 4.6% from 2012, according to the report.

Atlanta's airport also ranked first in airplane movements (takeoffs and landings), with 911,000 movements last year. O'Hare came in second with 883,000 movements and LAX was third with 696,000 movements. Rounding out that list were DFW; Denver; Beijing; Charlotte, North Carolina; Las Vegas; Houston and Paris.

Hong Kong's airport is still the busiest cargo airport in the world, transporting nearly 4.2 million metric tons of cargo last year. Memphis, Tennessee, home to FedEx, came in second with 4.1 million metric tons. Shanghai was third with 2.9 million metric tons. (One metric ton is 2,205 pounds.)

The ACI World Airport Traffic Report was based on reports from nearly 2,000 airports in 160 countries worldwide.