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Looking upward

In the clouds

Shuttle behind crane

Above the rooftops

Instagram effects

On a clear day

Above the Castle

Over the Capitol

Flying with flags

Coming in for a landing

It wasn't your everyday sight. Bolted to the back of a NASA 747 jumbo jet, the Shuttle Discovery made its last flight today, headed from the Kennedy Space Center in Florida to Dulles International Airport en route to its final home at the Smithsonian National Air and Space Museum's nearby Steven F. Udvar-Hazy Center.

We've already seen some great official NASA shots of the shuttle hitching a ride, but we wanted to see the display through the eyes of the many space enthusiasts who pointed their cameras and phones skyward today in hopes of capturing history. The results of their photographic efforts have been pouring in to Twitter all day (hashtag #SpotTheShuttle), and onto NASA's Spot the Shuttle Flickr site.

Click through our gallery to see a handful of our favorite shots from the D.C. crowd on the ground.
Caption by / Photo by Storm DiCostanzo (Paul and Storm)
With its retro styling, this stunning shot appears to come from another time. Tony Eckersley snapped it at the Top of the Town conference center in Arlington, Va. He arrived there early, camera in hand.

"We all expected the plane to fly in from the south, but it actually came from the north, meaning everyone was facing the wrong way," Eckersley told CNET. "I wasn't fully ready with my camera, so I set up the shot quickly and the auto white balance went a little crazy, making the image too warm -- hence the sepia tone. It was overexposing due to the clouds, so in turn, the plane was underexposed."

Judging by how the shot came out, we'd call that a happy accident.
Caption by / Photo by Copyright Tony Eckersley
Construction doesn't stop for shuttle travel, as Rudy D'Alessandro captured today from the roof of a 12-story commercial building in downtown Washington, D.C.
Caption by / Photo by Copyright Rudy D'Alessandro 2012
Another great shot by D'Alessandro, who used a Canon EOS 7D to capture the jet-riding shuttle passing over the D.C. area this morning.
Caption by / Photo by Copyright Rudy D'Alessandro 2012
Ethan Klapper, a Huffington Post social-media editor, was among many photographers who tapped Instagram filters to add even more drama to the shuttle's final flight. Here, Discovery flies over the Washington Monument.
Caption by / Photo by Ethan Klapper
A wider shot of the Washington Monument by Tony Eckersley captures a big day in the life of NASA and its well-traveled spacecraft, which blasted off on its maiden voyage on August 30, 1984, and ultimately flew 39 missions.
Caption by / Photo by Copyright Tony Eckersley
Darren Milligan, a digital-media designer and producer at Smithsonian Education, snapped this pic of the shuttle flying over the Smithsonian Castle, located on the National Mall in Washington, D.C., behind the National Museum of African Art.

"Thank you @NASA and @airandspace for a morning that reminded me how seriously amazing humans can be!" Milligan tweeted.
Caption by / Photo by Darren Milligan
Discovery's arrival in the Capitol offered dramatic views for the thousands -- including Edward Steven Perry who came out to watch.
Caption by / Photo by Edward Steven Perry
Look very closely and you'll be able to spot the shuttle toward the bottom-middle of this photo, snapped by Alex Moundalexis with a Canon EOS Rebel XS.
Caption by / Photo by Copyright Alex Moundalexis
Shuttle Discovery definitely isn't hard to spot, however, as it comes in low on final approach at Dulles International Airport. Keith Gillan snapped the shot at 11:05 a.m. ET using a Canon EOS 5D Mark II and standing, appropriately, next to the Smithsonian National Air and Space Museum, where it will make its permanent home.
Caption by / Photo by Keith Gillan
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