Happening today, leaders from Twitter and Facebook are heading to the nation's Capitol. The main issue on the agenda is how to keep foreign influence out of the political process.

Tech giants are under fire for allowing Russian-linked accounts to affect recent political campaigns.

Twitter CEO Jack Dorsey said, "Identifying more credible voices in real time and amplifying that credibility is something we can do, but we have not figured this out."

Facebook COO Sheryl Sandberg said, "we can retreat in fear, we can barrel ahead with a single-minded belief in our technology or we can fight like hell to do all we can knowing that what we build will be used by people."

Google says its CEO will not appear at the hearing.