Supreme Court sides against Navajo Nation in water rights case.

The US Supreme Court has ruled against the Navajo Nation in a dispute over water from the drought-stricken Colorado River. The tribe had sought an assessment of its water needs and a plan to meet them, arguing that treaties signed in 1849 and 1868 promised a sufficient supply of water. However, the court ruled that the treaties did not require the US government to take affirmative steps to secure water for the Navajo Nation. The decision reverses a ruling from an appeals court, which had allowed the tribe's lawsuit to go forward.