have now been removed from flights and replaced with pizzas. Gate Gourmet operates in 28 countries and serves an average of 9,700 flights every day of the year -- and over 300 million passengers annually. "You can't check every sandwich that goes aboard a plane," former FBI special agent Brad Garrett told ABC News. "This demonstrates to people who want to do bad things ... this is a gaping hole." In a statement Gate Gourmet said, "We take this matter very seriously. Gate Gourmet immediately launched a full investigation to determine the root cause of this disturbing incident, and we are treating this as a criminal act." Last year, ABC Atlanta affiliate WSB performed an investigation with an unnamed employee who worked for Gate Gourmet. A video allegedly shows how easy it is to add unauthorized food to unaccompanied carts. Do you have more information about this topic? If so, please click here to contact the editors of ABC News. Welcome to ABCNews.com. Javascript is not enabled on your browser. Please enable javascript to use the community features on this page. If your browser does not support javascript, please visit our browser upgrade page for a list of supported web browsers.