Last weekend saw the annual Aviation Nation Air and Space Expo at Nellis Air Force Base.

Located outside of Las Vegas, Nevada, Nellis has close ties to its neighboring city. Following the deadly mass shooting in Las Vegas in October, last weekend's air show commemorated and honored the city and the shooting's victims.

The show also featured US Air Force history, as the Air Force celebrates its 70th anniversary. About 400,000 people were expected to visit the two-day expo.

"This is freaking awesome. It really shakes you in your boots," one observer told the Las Vegas Review-Journal. "It is rare that you get to see this stuff."

Here's what it was like inside the Aviation Nation Air and Space Expo:

Nellis servicemen customized several aircraft, including this F-16 Fighting Falcon, to display the base's Vegas Strong message.

This F-15C Eagle was painted to commemorate the shooting, which took place at a country music festival on October 1.

Here's more detail on the tail.

The aircraft had to be completely repainted in some cases.

Here's the final product on another F-15C Eagle.

Here's what they normally look like, without the paint job.

Aside from the memorials to the Las Vegas shooting, the Air and Space Expo had some of the best features of a traditional air show. Spectators were treated to a show from the Air Force Thunderbirds.

The opening ceremony featured members of the Air Force's Wing of Blue Parachute Team jumping out of aircrafts.

Here's what it looks like when they land.

Aviation Nation also celebrated the 70th Anniversary of the US Air Force, showcasing older aircraft such as the B-25 Mitchell.

The Texas Flying Legends flew in formation, showing off some WWII-era aircrafts.

Also on site was a U-2S Dragon Lady.