Mark Zuckerberg answered questions in the US Senate and Twitter delivered the best memes
Facebook's founder and CEO testified to a joint hearing of the Commerce and Judiciary Committees of the US Senate about the use of Facebook data to target American voters in the 2016 election on Tuesday.
It may have been a serious subject (serious enough for Mark Zuckerberg to wear a suit over his usual grey T-shirt and jeans combination), but Twitter wasn't taking proceedings too seriously.
Here are some of the best memes from the first of two days the CEO will spend testifying.
Zuckerberg is no stranger to being made fun of in meme form, and this hearing was no different.
Many felt that due to the average age of people in the Senate - 62 years old - the questions may be a little outdated.
To that end, a Huff Post editor thought perhaps there could be an alternative set of people to grill the Facebook CEO.
Others noticed this guy in the background.
It turns out he's actually Facebook's vice president of global policy, Joel Kaplan.
Tried and tested meme formats were also used - this one made particularly clever mention of MySpace Tom.
Wednesday is sure to bring many more hilarious takes on the democratic process of holding big business to account.