Tech executives are expected to sit down Friday with members of the Obama administration and U.S. intelligence officials to talk about how to combat online radicalization, a source familiar with the meeting told Reuters. White House Chief of Staff Denis McDonough, FBI Director James Comey, and National Intelligence Director James Clapper are planning to attend, the source said. Twitter, Apple, Facebook and Google confirmed they are attending while several other companies including Microsoft, LinkedIn and Dropbox are expected to be there. Topics on the agenda reportedly include how to make it more difficult for militants to recruit supporters on social media as well as helping users to create content to undermine groups like ISIS. The White House has not confirmed the meeting, but sources told The Guardian the summit will take place at 11 a.m. PT in San Jose, California.