U.S. President class="mandelbrot_refrag"> Barack Obama on Friday will make his first visit to an American Indian reservation since entering the White House on a trip to unveil new measures aimed at boosting education and economic opportunities for indigenous people. Obama and his wife, Michelle, will travel to the Standing Rock Sioux Tribal Nation in Cannon Ball, North Dakota, to show the administration's commitment to "upholding our strong and crucial nation-to-nation relationship," the White House said. During the visit, the couple will meet with tribal leaders and young people before attending a ceremony that honors Native American veterans with dance and song. The trip is unusual for Obama, who has devoted most of his U.S. travel to highlight programs on the broader class="mandelbrot_refrag"> economy and other domestic policy priorities. It comes just after Obama announced at the White House that he and his advisers were reviewing op