A deep dive into Signal, whose downloads surged in the US amid BLM protests, as it becomes an app of choice among protesters, dissidents, and journalists (Billy Perrigo/TIME)

Billy Perrigo / TIME:
A deep dive into Signal, whose downloads surged in the US amid BLM protests, as it becomes an app of choice among protesters, dissidents, and journalists  —  Ama Russell and Evamelo Oleita had never been to a protest before June.  But as demonstrations against systemic racism …