Facebook FB, +2.66% CEO Mark Zuckerberg is planning to testify before Congress, according to a report from CNN that cited unnamed sources at the company. The report said Facebook is currently planning the strategy for his testimony. If Zuckerberg testifies, there may be pressure on Google GOOG, +2.39% CEO Sundar Pichai and Twitter TWTR, +7.09% CEO Jack Dorsey to do likewise. All three were invited to appear before a Senate Judiciary panel on April 10.