"The actions we've taken in response - beginning with the steps Facebook's General Counsel, Colin Stretch, outlined to this Committee a year ago - show our determination to do everything we can to stop this kind of interference from happening".
Sandberg, in her prepared remarks, detailed how Facebook was addressing the problem but reiterated that the company was slow to spot it.
Facebook, she said, is "investing heavily in people and technology to keep our community safe and keep our service secure", including doubling the number of people working on safety and security issues to 20,000.
For the most part, this also means the Republican House Majority will likely be asking questions pertaining to Twitter censorship of conservative voices on the platform - such as the temporary suspension of far-right conspiracy theorist Alex Jones.
Sheriff: Man shot after concert tickets argument
San Diego's FOX 5 reported that a San Diego Sheriff's Department deputy had shot a suspect near the racetrack entrance. Inside the venue, the evening's final horse racing event was taking place.
"We're shutting down fake accounts and reducing the spread of false news", Sandberg said. Mark Zuckerberg, the company's founder and CEO, faced tough questioning on the platform's internal practices when he testified before Congress in the wake of the Cambridge Analytica data breach scandal.
A spokesperson for Twitter declined to comment, but in past hearings Twitter officials have affirmed the gravity of the situation.
"Twitter does not use political ideology to make any decisions, whether related to ranking content on our service or how we enforce our rules", Dorsey said in prepared testimony obtained by Fox News.
Twitter's Dorsey also will testify at a House of Representatives hearing on Wednesday that the company "does not use political ideology to make any decisions", according to written testimony also made public on Tuesday.
Petrol price hits a record high in Mumbai
The US sanctions on Iran is not the only reason for India to be anxious about a possible spike in petrol and diesel prices. Fuel prices have been on the rise since August 16 after the rupee dipped to its lowest value against the USA dollar.
"We believe strongly in being impartial, and we strive to enforce our rules impartially", he said.
Senator Richard Burr, the committee's Republican chairman, said he expected the hearing would focus on solutions to the problem of foreign efforts to influence USA elections and sow political discord, with a jab at Google.
Facebook and Twitter executives, defending their companies on Capitol Hill, said Wednesday they are aggressively trying to root out foreign interests seeking to sow divisions in American democracy as the November elections near.
"You don't understand the problem if you don't see this as a large effort from whole of government and the private sector", Burr told reporters at the Senate.
Epic send-off for the Queen of Soul
One of Franklin's most iconic performances was at Obama's 2009 inauguration, where she sang "My Country, 'Tis of Thee". Former president Bill Clinton joked that he and former Secretary of State Hillary Clinton were "Aretha groupies".