Hamburger and Sonic also rely heavily on hamburger sales. Fuddruckers and Red Robin are hamburger chains that specialize in the mid-tier "restaurant-style" variety of hamburgers. Some restaurants offer elaborate hamburgers using expensive cuts of meat and various cheeses, toppings, and sauces. One example is the Bobby's Burger Palace chain founded by well-known chef and Food Network star Bobby Flay. Hamburgers are often served as a fast dinner, picnic or party food and are often cooked outdoors on barbecue grills. A high-quality hamburger patty is made entirely of ground (minced) beef and seasonings; these may be described as "all-beef hamburger" or "all-beef
Hamburger Hill researching the Battle of Hamburger Hill. Irvin, an English-born filmmaker, worked on several documentaries in Vietnam in 1969. Vincent Canby of "The New York Times" called "Hamburger Hill" a "well-made Vietnam War film that narrows its attention to the men of a single platoon in a specific operation." In differentiating the film from "Platoon", he noted the film "refuses to put its characters and events into any larger frame. It could have been made a week after the conclusion of the operation it recalls, which is both its strength and weakness, depending on how you look at it." Hal Hinson