By Ben Popken, Cynthia McFadden and Kevin Monahan in nbcNews:

OMAHA, Neb. — Just off a bustling interstate near the border between Nebraska and Iowa, a 2,800-square-foot American flag flies over the squat office park that is home to Election Systems & Software LLC.

The nondescript name and building match the relative anonymity of the company, more commonly known as ES&S, which has operated in obscurity for years despite its central role in U.S. elections. Nearly half of all Americans who vote in the 2020 election will use one of its devices.

That’s starting to change. A new level of scrutiny of the election system, spurred by Russia’s interference in the 2016 election, has put ES&S in the political spotlight. The source of the nation’s voting machines has become an urgent issue because of real fears that hackers, whether foreign or domestic, might tamper with the mechanics of the voting system.

That has led to calls for ES&S and its competitors, Denver-based Dominion Voting Systems and Austin, Texas-based Hart Intercivic, to reveal details about their ownership and the origins of the parts, some of which come from China, that make up their machines.

But ES&S still faces questions about the company’s supply chain and the identities of its investors, although it has said it is entirely owned by Americans. And the results of its government penetration tests, in which authorized hackers try to break in so vulnerabilities can be identified and fixed, have yet to be revealed.

Read the full article here.