Some great discs are being released this week. Check out these new movies: The Expendables 2 [Blu-ray review] - Sylvester Stallone again leads a troupe of veteran and current action stars into war, this time with a leaner, more exciting film that finds a good balance between serious action and self-referential humor; Ken Burns: The Dust Bowl [Blu-ray review] - The famous documentarian takes a look at America's worst man-made ecological disaster in a sobering four-hour documentary. It is essential viewing for anyone remotely interested in 20th century American history; and Diff'rent Strokes: The Complete Fourth Season [Blu-ray review] - Despite some elements being dated, most of the episodes from this 1981-82 season still hold up today. Be sure to check out our DVD Talk Review Database for all the latest reviews including an entire section devoted to reviews of DVDs out this week.