Pichai says 'Google cares', Bezos 'can't remember' in Congressional hearing

Sundar Pichai squirms when asked whether he signed off on the company's 2016 decision to merge data from the advertising company Double Click

Four big tech CEOs -- Facebook's Mark Zuckerberg, Amazon's Jeff Bezos, Sundar Pichai of Google and Tim Cook of Apple -- pushed back against accusations during a US Congress panel hearing capping a yearlong investigation into these companies' market domination online.

Amid intense grilling on issues that centred on market power derived from uninhibited collection and access to data, all four CEOs focused their attention on the value of their innovations and services to consumers. They testified via video link to lawmakers in Washington, DC.

Google CEO Sundar Pichai struggled to deflect accusations of anti-conservative bias and retreated multiple times