The head of Colonial Pipeline faced tough questions from lawmakers about the ransomware attack on his company that caused a major disruption in the nation's fuel supply.

Colonial Pipeline CEO Joseph Blount explains why he decided to pay a ransom after the company’s computers were hacked last month.

Colonial Pipeline CEO Joseph A. Blount Jr. was grilled by lawmakers Tuesday about the ransomware attack his company that caused a run on the nation's gasoline supply.

Nearly 800 people were arrested around the world as part of Operation Trojan Shield, which used an encrypted communications platform called ANOM to allow law enforcement to track down crime gangs.

The Justice Department announced it has recovered millions in cryptocurrency paid to the cyber criminal group DarkSide following last month's ransomware attack.

The Justice Department on Monday announced it has seized millions paid by Colonial Pipeline in a ransomware attack.

The administration says companies need to step up their security against hackers after serious incidents involving the meat and transportation industries.

Fuel outages persist, and the national gas price average remains at its highest level in six years, even as the Colonial Pipeline has resumed operations.

The Colonial Pipeline is back up and running, but some areas, like D.C. and the Carolinas, are still facing shortages as operations slowly return back to normal.

The shortages come days after the cyberattack on the Colonial Pipeline.

In the wake of the Colonial Pipeline ransomware attack, some areas like Washington, D.C. are still hard hit with more than 80% of pumps without fuel.

While the threat of gas shortages has decreased since the restart of the Colonial Pipeline, 80% of gas stations in Washington, D.C., are still out of fuel.

The gas shortages caused by the pipeline shutdown and panic buying persist.

ABC News has confirmed that Colonial did pay a ransom to hackers to restart the pipeline. Experts say that many businesses have insurance policies that protect them from cyberattack losses.

Only 34 employees are responsible for securing 2.7 million miles of pipeline.

Gas prices dropped in several states in the Southeast as one of the nation’s largest pipelines got back up and running after last week’s cyberattack, but hundreds of stations remain without fuel.

The Colonial Pipeline ransomware attack is just the latest in the past year of cyberattacks that have had detrimental impacts to the United States.

There are still lines at gas stations and hundreds of empty pumps as people worry they might miss work or a doctor’s appointment.

Biden issued an executive order after a cyberattack crippled a critical fuel pipeline, causing gas shortages in several states.

Former Homeland Security official Elizabeth Neumann explains the wide-ranging effects the ransomware attack on fuel supply and gas prices.

President Joe Biden on Thursday aimed to ease concerns from Americans over high gas prices and fuel shortages after the Colonial Pipeline cyberattack.

The company has begun to restore its fuel lines following a multi-day shutdown in the wake of a ransomware cyberattack and massive supply shortages.

President Joe Biden detailed the initiatives the administration is taking to prevent future attacks from happening while urging Americans not to panic.

The cyber attackers that compromised Colonial Pipeline's systems demanded "millions" of dollars in ransom, sources briefed on the investigation told ABC News.

Several states in the Southeast are low on gas after a cyberattack crippled a critical fuel pipeline.

The national gas price average has hit $3 a gallon due to supply shortages brought on by the ransomware attack on one of the nation’s largest fuel lines.

The shadowy organization is believed to be responsible for the pipeline cyberattack that has caused havoc with fuel supplies in the Southeast and along the East Coast.

The White House will create a “standardized playbook” for how it responds to attacks, including modernizing cybersecurity standards and improving its ability to detect and eliminate threats.

The shutdown had caused panic in many southeastern states.

Gasbuddy reported at one point nearly two-thirds of all gas stations in North Carolina were out of fuel, and more than half were out in Atlanta. There are reports of people hoarding gas.

Residents race to fill up gas tanks as shortages take hold in the Southeast.

Federal authorities have urged for calmness and against panic-buying.

People waited in long lines outside gas stations amid fears of shortages after a cyberattack forced the shutdown of a major gas pipeline in the U.S.

The Federal Bureau of Investigation confirmed in a statement Monday that Darkside ransomware was responsible for the compromise of the Colonial Pipeline networks.

Multiple states face a dwindling supply of gas as a result of the Colonial Pipeline ransomware attack by hackers with North Carolina declaring a state of emergency as pumps run dry.

The acting director of CISA, Brandon Wales, appeared before the Senate Homeland Security and Governmental Affairs Committee on Tuesday.

Energy Secretary Jennifer Granholm announced the company that runs the Colonial Pipeline still hasn’t determined when it will be safe to restart the pipeline as demand for gas rose nationwide.

Pipeline shutdown fuels panic buying, gas shortages, hike in prices