ALBUQUERQUE, N.M. (AP) — Security concerns about a proposed $2 billion transmission line between Arizona and New Mexico can be resolved, according to the U.S. Defense Department.

Defense Secretary Chuck Hagel said in a letter Tuesday to U.S. Interior Secretary Sally Jewell that concerns about routing the SunZia transmission project through an area used by White Sands Missile Range could be addressed by burying five miles of the line.