Traffic is a solid drama by Steven Soderbergh that's all about the drug war an its real life futility. The scenario is a nice mesh of stories that are captivating with lots of drama, some excellent action, a bit of intrigue, and some suspense.
The acting is uniformly great for this star studded cast. Here are those that truly distinguished themselves: Benicio Del Toro, Michael Douglas, Catherine Zeta-Jones, Erika Christensen, and Don Cheadle. They admirably portrayed the main characters.
In secondary roles, I also liked Dennis Quaid, Topher Grace, and Luis Guzmán. In an uncredited and very small part, you can briefly see the beautiful Salma Hayek.
A must see, unless you don't like tough movies.