Native American from more than 20 reservations in North and South Dakota prepare for the arrival of President Barack Obama and first lady Michelle Obama on the Standing Rock Indian Reservation, Friday, June 13, 2014, in Cannon Ball, N.D. President Obama is making his first presidential visit to Indian Country for a look at two sides of Native American life, a celebration of colorful cultural traditions on the powwow grounds and a view of the often bleak modern-day conditions on tribal lands. (AP Photo/Charles Rex Arbogast), APTOPIX