The historic legal battle against federal government lawyers - which comes just a week after Google's 25th birthday - is set to be the biggest in almost two decades. Read more science and tech news:'He was a titan': Dolly the sheep clone scientist diesDistant exoplanet 'could have water ocean and signs of life'Be the first to get Breaking NewsInstall the Sky News app for freeTop executives at Google and its corporate parent Alphabet Inc, as well as those from other powerful technology companies, are expected to give evidence during the court case. If he decides Google broke the law, another trial will decide what steps should be taken to rein in one of the tech world's most powerful companies