LOS ANGELES (AP) — The world's biggest social media companies face several landmark trials this year that seek to hold them responsible for harms to children who use their platforms. Opening statements in one such trial in Los Angeles County Superior Court began on Monday. Instagram's parent company Meta and Google's YouTube face claims that their platforms deliberately addict and harm children. TikTok and Snap, which were originally named in the lawsuit, settled for undisclosed sums. Jurors...