Jury selection has officially begun in a high-profile lawsuit against the world’s biggest social media companies. While TikTok and Snap have recently settled, Meta and Google’s YouTube are heading to court to defend their product designs against claims that they knowingly fuel a youth mental health crisis.

The two major tech companies will face a jury trial for the first time over allegations that their social platforms have contributed to youth mental health issues.

Two senior Democratic lawmakers, including Pramila Jayapal (D-WA), have pressed Meta and Google to end their digital advertising partnerships with the US Department of Homeland Security, alleging that Immigration and Customs Enforcement has used the companies’ platforms to run recruitment and “self-deportation” advertisements drawing on white nationalist imagery and rhetoric.

Wall Street wants an answer now on the only question that has reliably moved the AI complex: Is the buildout still expanding — and at what price?