Watch live: SpaceX launches satellites into orbit for the second time in 48 hours
Iridium made the first major commercial attempt to build a big-time satellite network back in the 1990s. Now, the company is turning to SpaceX to help replace its aging constellation—an operation Iridium likes to call the world’s largest tech upgrade. At 4:25 pm ET (8:25 p.m. GMT) today, a brand-new SpaceX Falcon 9 rocket will…