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WASHINGTON The hallway where an angry mob of rioters first broke into the U.S. Capitol looks exactly as it did before the attack.

The shards of broken glass that once littered the marble floor are long gone. The reinforced doors that were smashed through have been replaced. A blood-stained bust that witnessed Capitol Police Officer Eugene Goodman bravely confront the mob has been restored, its face smeared with red no more. The mayhem is but a memory.

Theres nothing to greet visitors, either: No plaque marks Jan. 6, 2021, one of the darkest days in U.S. history.

But the scars of that day are evident in other ways, especially in the House of Representatives, where members are facing an avalanche of threats at home and even from fellow colleagues at the Capitol. Theyre spending more on personal security than ever. The metal detectors that were installed at entrances to the House floor following the attack are still standing, a glaring reminder of the poisonous atmosphere that has pervaded over the past year.

The tone gets, you know, tougher and tougher. It is a pretty toxic place. Ive never seen anything like this before, Rep. Fred Upton (R-Mich.), who has served in Congress for 35 years, noted in a CNN interview last week.

One Year After The Attack

In recent months, a GOP lawmaker posted an animated video showing him killing a Democratic congresswoman, and he was later censured over it. Another GOP lawmaker got into a screaming match with the same Democrat on the steps of the Capitol, as well as a separate feud with a GOP colleague . Democrats are also pushing to strip a separate GOP member of her committee assignments after she called a Muslim congresswoman a terrorist .

Threats made to members of Congress are up threefold this year, according to the Capitol Police. Although some of the rancor predated Jan. 6, theres no doubt the events have made it worse.

Things in the Senate havent been nearly as acrimonious. Interviews with over two dozen lawmakers and aides shed light on a working environment that seems more secure, but one where day-to-day life feels pretty much the same as before, not counting the trauma experienced by those who were in the building as the screaming mob advanced into the building.

It seems like its as if it never happened, Sen. Lisa Murkowski (R-Alaska) said, recalling the hundreds of National Guard troops and barbed wire fencing posted at the Capitol following the attack.

Some lawmakers are grappling with whether to attend commemoration events planned on Capitol Hill for the one-year anniversary. On the one hand, members of Congress feel their presence can help send a message about being undeterred. But others, like Sen. Susan Collins (R-Maine), feel the day is too freighted with anxiety and anger for any kind of formal events.