But the Bosnian government also needs the Posavina corridor for vital access to the Sava River.

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"Today, there's still insecurity, " Murthy said, adding that aid workers have limited access to many areas and a planned humanitarian corridor has yet to open.

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Nuevo Laredo is close to the Interstate 35 corridor, and Juarez has easy access to I-10, a major east-west interstate, and I-25, which runs north to Denver, Colorado.

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The Vasari Corridor is closed to the general public, so gaining access involves some pre-planning.

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