The Secretary or a designee of the Secretary shall have the
authority to -
(1)
determine the amount of, settle, and adjust any claim
arising under this chapter; and
(2)
waive such a claim if the Secretary determines that to do
so will serve the purposes of this chapter.
Nothing contained in this section shall be construed to diminish
the authority of the Attorney General of the United States under
section 516 of title 28 to conduct litigation on behalf of the
United States