Matthew McConaughey, who stars as Dirk Pitt in the upcoming action-adventure "Sahara," has begun a six-week U.S. cross-country promotional tour.

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McConaughey, will travel in his personal Airstream trailer, which has been specially outfitted with art from the film, to meet fans at dozens of stops, spreading the word about his new film. McConaughey will document his experiences in a blog at mtv.com/movies.

In "Sahara," master explorer Pitt takes on the adventure of his life when he embarks on a treasure hunt through some of the most dangerous regions of West Africa.

Searching for what locals call the "Ship of Death," a long lost Civil War battleship that protects a secret cargo, Pitt and his wisecracking sidekick, played by Steve Zahn, use their wits and clever heroics to help Dr. Eva Rojas, played by Penelope Cruz, when they realize the ship may be linked to mysterious deaths in the very same area.

The film opens in theaters nationwide April 8.