Army Secretary Mark Esper emphasized the value of prototyping to improve requirements definition as the service aims to streamline its acquisition process, detailing an array of efforts taken or underway during Dec. 7 testimony before the Senate Armed Services Committee. Esper said since being sworn in Nov. 21, he has become "even more convinced" that significant acquisition reform is required to achieve the Army's modernization goals. While acknowledging that "a long road lies ahead . . . and the challenges...