Not long after the Ohio train derailment, pro-Russian voices on Twitter began spreading anti-U.S. propaganda about the incident

Sen. Bob Casey’s bill, set to be introduced Thursday, would create a new fund which would be used to reimburse emergency responders

Eight freight rail cars carrying corn syrup derailed near Topock, Arizona on Wednesday evening, according to BNSF Railway, not hazardous materials.

Ohio Attorney General Dave Yost said the state filed a lawsuit Tuesday against Norfolk Southern over last month's toxic train derailment in East Palestine.

Ohio Attorney General Dave Yost said the state filed a lawsuit Tuesday against Norfolk Southern over last month's toxic train derailment in East Palestine.

Here's a look at what's unfolded so far since a freight train carrying hazardous materials derailed on Feb. 3 near East Palestine, Ohio.

The head of the National Transportation Safety Board criticized embattled train operator Norfolk Southern's new safety goals amid a series of train derailments in recent weeks.

ABC News’ Martha Raddatz interviews National Transportation Safety Board Chair Jennifer Homendy on “This Week.”

Headaches, congestion, itchy skin rashes — and fear

The Association of American Railroads said defective wheels were involved in the Norfolk Southern train crash in Springfield, Ohio, on Sunday.

Shaw declined to directly answer what Norfolk Southern would specifically do for affected families in Thursday's congressional testimony.

A series of rail cars that Norfolk Southern recently put into service have been discovered to have defective, loose wheels.

Norfolk Southern CEO Alan Smith is slated to testify Thursday before a Senate Committee in Washington in the wake of the toxic train derailment in East Palestine, Ohio.

Alan Shaw testified before lawmakers on Capitol Hill and told East Palestine, Ohio residents he was deeply sorry for the derailment.

ABC News’ Jay O’Brien reports on Capitol Hill testimony from Norfolk Southern’s CEO following multiple train derailments and provides updates on Sen. Mitch McConnell's health.

CEO Alan Shaw apologized to residents of East Palestine, Ohio, and promised to "make this right."

ABC News’ Jay O’Brien and Gio Benitez report on Norfolk Southern CEO's Capitol Hill testimony and former NTSB chief Jim Hall breaks down why the nation’s rail system is facing problems.

Norfolk Southern Railway CEO Alan Shaw testifies before Congress on recent rail derailments.

The investigation comes as the CEO testifies before Congress about other derailments in February.

As Norfolk Southern CEO Alan Shaw is set to testify before Congress, officials are looking into the company’s handling of a separate incident on Feb. 27.

Federal regulators are looking into Norfolk Southern's handling of an additional reported hazmat concern, just weeks after the derailment in East Palestine, Ohio.

U.S. safety investigators released a preliminary report into the derailment of a Norfolk Southern train carrying toxic chemicals in East Palestine, Ohio.

NTSB investigators are on the ground of another Norfolk Southern derailment in Ohio that took place over the weekend.

Four of the 28 cars of a Norfolk Southern train that derailed Saturday near Springfield, Ohio, were empty at the time of the accident, according to officials.

ABC News’ Alex Presha reports from Springfield, Ohio, after a Norfolk Southern train derailed there. It marks the second time one of the freight carrier’s trains has derailed in the state in a month.

Ohio Sen. Sherrod Brown speaks with "GMA3" after another Norfolk Southern train derails in Ohio one month after the first derailment caused a toxic chemical spill in East Palestine.

Officials from Ohio and Norfolk Southern deliver remarks on another train derailment, the second such incident in just over a month.

This comes after Norfolk Southern has announced it is removing 2,000 feet of tracks in East Palestine, Ohio, to remove contaminated soil from the February derailment.

The announcement came as the Atlanta-based rail operator faced scathing criticism and scrutiny.

No hazardous materials were involved after a Norfolk Southern train derailed Saturday near Springfield, Ohio, officials said, the second such incident in just over a month.

Norfolk Southern is facing more scrutiny over safety after another freight train derailed over the weekend. ABC News’ Liz Nagy has details.

Authorities in Ohio say there is no indication of any risk to public health from the derailment of a Norfolk Southern cargo train between Dayton and Columbus, the second derailment of a company train in the state in a month

Twenty-eight cars from a massive 212 car train derailed, including four empty tankers with residual amounts of diesel exhaust fluid and common industrial products.

Pete Buttigieg is firing back at Republican critics of his response to the train derailment in East Palestine, Ohio, in a new interview

Bad smells from the toxic train derailment in East Palestine, Ohio, may be causing health issues.

Sherrod Brown touted the need for new bipartisan rail safety legislation weeks after the train derailment in East Palestine sparked an uproar.

Former President Donald Trump on Wednesday toured the Ohio town near a toxic rain derailment three weeks ago.

George Stephanopoulos interviews Sen. Sherrod Brown, D-Ohio, on “This Week.”

Authorities in Clark County said they determined the second Norfolk Southern train to derail did not spill hazardous material.

It's the second derailment of the company’s trains in Ohio in a month.

Biden's been pressed to visit the site since a Norfolk Southern freight train carrying hazardous materials derailed on Feb. 3.

The first of some 2,000 feet of track are beginning to be removed from the East Palestine crash site as we get a first look at the health problems of residents.

Angry community members lined up to report concerns about their health and livelihoods following last month's toxic train derailment.

Residents expressed concerns of exposure to high levels of toxins.

A town hall in East Palestine, Ohio, Thursday became heated as residents confronted town officials and Norfolk Southern, demanding answers about the train derailment.

The U.S. Environmental Protection Agency is ordering rail operator Norfolk Southern to begin testing for dioxins in the area where a train carrying toxic chemicals in Ohio

Residents are saying they’re still suffering from illnesses nearly a month after a train carrying toxic chemicals derailed in Ohio

President Joe Biden has been pressed to visit the site since a Norfolk Southern freight train carrying hazardous materials derailed on Feb. 3.

ABC’s Elizabeth Schulze breaks down the newly proposed legislation in the wake of the toxic train derailment in East Palestine, all as President Joe Biden meets with Senate Democrats on Capitol Hill

A freight train carrying hazardous materials derailed on Feb. 3 near East Palestine, Ohio, and ABC News created a visual timeline of key events in the toxic train disaster.