ALBUQUERQUE, N.M. (AP) — Scientists and researchers at the federal government's largest national laboratory are pushing ahead with work related to national security and the proliferation of nuclear weapons as new managers take over New Mexico-based Sandia National Laboratories for the first time in decades, officials said Monday.

Director Stephen Younger discussed the lab's future during a news conference that marked the start of a new contract with National Technology and Engineering Solutions of Sandia, a subsidiary of Honeywell International.

The U.S. Energy Department's National Nuclear Se...