Last week, Facebook CEO Mark Zuckerberg faced antitrust concerns from European Union parliament members, in a Brussels meeting addressing the platform’s privacy and targeted ads post-Cambridge Analytica.

It’s not the first time an American tech company has come under antitrust scrutiny, at home or abroad. Microsoft president and chief legal officer Brad Smith told Recode’s Kara Swisher on Tuesday that Facebook’s current situation has parallels to his own company’s antitrust battles in the late 1990s.