Marketplace host Kai Ryssdal takes a bite of a sandwich from the South Philly Express food truck in Los Angeles.

Marketplace audio engineers go inside an LA food truck for an interview with a food truck worker.

The 'Pyongyang Express' food truck outside an office building in Los Angeles. Unlike other gourmet food trucks, the 'Pyongyang Express' is a part of a marketing campaign for a soon-to-be-released video game called 'Homefront' in which players shoot and kill North Korea forces invading the United States in 2027. The prices of food and drink available from the truck is less than half the price of any other truck, with the video game's maker, THQ, subsidizing the price to bring more attention to the truck and the game.

The Gastrobus parked in downtown Los Angeles at the LA Street Food Fest.

El Taconazo, a taco truck in Caldwell, Idaho, submitted via Facebook by Marketplace listener Mark Pemble.

Crazy Cactus Catering has been servicing the Indianapolis area since 2008 with street food. Visit them online at www.crazycactusgrill.com

Daniel Castellanos of Miami, Florida, writes: This beautiful food truck rolls around Miami and serves delicious burgers/tacos by chef Ingrid Hoffman.

Michelle Javan of Seattle, Washington, writes: "Oh man does this have the best BBQ in Seattle - I have a friend who keep her diet all organic veggies etc...she does not eat meat EXCEPT for Maximus Minimus! There is always a line. I grabbed this picture after they closed, just before they left. They are not around during the winter so they make us wait in anticipation for Spring when they start showing up all over the Seattle area again! http://www.maximus-minimus.com/

Andy Grimes of Atlanta, Georgia, sent us this photo and writes: "The Pickle hit the road in 2004 doing mostly festival, concerts and sporting events in Atlanta and throughout the southeast. Serving up our tasty menu of Southwestern and Cajun specialties. In Atlanta we are in the process of creating a more receptive environment for food trucks. The Atlanta Street Food Coalition is diligently working toward that goal. Online at: http://ultimateculinary.com/pickle.htm.

Michael Muir-Harmony of Bernardston, Mass., sent us this photo and writes: "My favorite food truck is Clover Food Lab truck onthe MIT campus. This truck was started a year and a half ago as an experiment. It it a high tech approach to food trucks with too numerous wireless gadgets and gismos to name; all working to serve an amazing amount of customers in a very short time. The food is fresh, mostly organic, local, and delicious. Top chefs create the ever changing menu. The truck started as a lab to create menus for the first nation-wide fast food chain of vegetarian restaurants, but has become a phenomena in itself in the Cambridge and Boston area. A second truck has started up in Boston, and has been featured often in the Boston Globe. The truck will be featured tomorrow night on a TLC program about food trucks. There is a website and blog that documents the truck's development andprogress. http://www.cloverfoodlab.com/. Thanks again for the interesting piece tonight on food trucks."

Andrea L DiMauro of Olivebridge, New York, sent us this photo of Mabel On The Move, a "supercool mobile eatery in a 1962 vintage Airstream trailer." Here she is in Rosendale, N.Y., serving organic food including soup, salads, hot dogs, ice cream.

Gavin DiMundo, of Santa Monica, Calif., posted this photo of the Nom Nom food truck in Los Angeles, known for its "Banh Mi," or Vietnamese Sandwiches, and other Vietnamese-inspired dishes.

Here's another LA food truck photographed by Gavin DiMundo of Santa Monica, California. Get ready to Kabob N' Roll.

Donny Tsang of Las Vegas, Neveda, posted this photo to our Facebook page and writes: "This is a photo I shot of the Big Gay Ice Cream Truck last year at their season end's party. Super warm and fun guys that come up with the craziest and delicious toppings for ice cream."

Marcelo Padin of Oakland, California, sent us this photo and writes: "This is a GREAT truck that serves Argentine Style Barbecue - slow grilled meats"

Sonny Horn, Austin, Texas sent us this photo of "The Hot Dog King of Austin," who works the late-night bar scene in downtown Austin at 8th and Red River Streets. "Excellent high-quality dogs including the very best veggie dogs," Horn writes.