Crunch time for Apple as it prepares for face-off with FBI

What might happens at this week's congressional hearing as the iPhone maker continues to defy last month's court order over phone encryption?

On Tuesday, Apple will face one of the biggest corporate challenges in its history, when it tells a US House of Representatives committee why it has refused to help law enforcement officers break into the iPhone of Syed Farook - one of the gunmen in the San Bernardino shooting in December that left 14 dead and 22 wounded. The technology giant will be represented by its top lawyer, Bruce Sewell; making the case against it will be FBI boss James Comey.

Apple, the world's most valuable private company, has come under fire from many in politics and law enforcement after refusing to comply with the 16 February court order.