What is the meaning behind this particular squawk code?

Abstract: Multilevel polar-coded modulation exploits bit-level reliability diversity and can operate closer to coded-modulation capacity than bit-interleaved coded modulation. Existing constructions ...

Orlando is preparing to mark 10 years since the Pulse nightclub shooting that killed 49 people and injured dozens more on June 12, 2016. The tragedy sparked worldwide tributes, annual remembrance ...

As the June 12 anniversary of the massacre that claimed the lives of 49 people approached, PEOPLE spoke to survivors and loved ones of those lost. "There's not a year that goes by that I don't ask ...