Adrienne Murray visits the Esrange Spaceport in the far north of Sweden.
GPS jamming has made navigation hazardous in the Gulf, spurring efforts to develop alternatives.
The family alleges the firm knew the perpetrator was planning a “mass casualty event” but failed to contact the authorities.
Signal says its systems are secure but it is taking reports of targeted attempts to hack some officials “very seriously”.
Epic Games said it had to increase the price as the cost of running the game had “gone up a lot”