TWITTER -FACEBOOK- PLEDGES

WASHINGTON : Facebook and Twitter executives pledged on Wednesday to better protect their  social media platforms in the 2018 elections and beyond, and told Congress of aggressive efforts to root out foreign intrusions aimed at sowing divisions in American democracy.

Facebook's No 2, executive Sheryl Sandberg, and Twitter's CEO Jack Dorsey, testified before the Senate intelligence committee, but there was an empty chair for Google's parent Alphabet, which refused to send its top executive.

Sandberg's appearance came several months after Facebook CEO Mark Zuckerberg testified in highly publicized Capital hill hearings.

Like Zuckerberg, she acknowledged Facebook's lag in reognising Russian efforts to manipulate Facebook during and after the  2016 US presidential election.

''We are even more determined than our adversaries, and we will continue to fight back,'' Sandberg said.

Dorsey far less of a public figure than Sandberg, acknowledged that that he is ''typically pretty shy.''  But he was forthcoming with the committee about what his company needs to improve.

Holding his phone at the witness table, he tweeted some of his opening statement :

''We aren't proud of how that free and open exchange has been weaponized and used to distract and divide people, and our nation.

We found ourselves unprepared and ill-equipped for the immensity of the problem we have acknowledged. AP