The world's busiest airport is getting even busier, with record crowds filling Hartsfield-Jackson International for the holidays.

Nov. 20, 2015 - Atlanta - Kellan Trawny, 5, from Smyrna, keeps watch on the family dog while his mom checks in at the Delta Kiosk. Record crowds are expected along with long lines and delays at Hartsfield-Jackson Atlanta International Airport, the world's busiest airport, which is forecasting some of the biggest increases in traffic it has seen in years. BOB ANDRES / BANDRES@AJC.COM

Credit: Kelly Yamanouchi

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Credit: Kelly Yamanouchi

In a year that the Atlanta airport expects to handle a record-breaking 100 million passengers, the holiday rush will be even bigger than past years.

To learn how much time airport officials are now advising you allow to get through security and navigate the airport -- and why -- read the full story on holiday crowds at the airport here.

And to find out how much longer the security wait gets when someone in line tries to take a weapon through the security checkpoint, read our story on TSA checkpoints here.

More from the AJC on the Atlanta airport and holiday travel: