JERUSALEM — Almost 12 months of unbridled war, death, destruction and suffering in Gaza have proved the deadliest conflict on record for journalists. One year in, NBC News has spoken to 21 media professionals and organizations in the region who described killings, attacks and arrests by Israeli forces.

As of Aug. 31, 116 journalists had been killed since Oct. 7, according to statistics from the Committee to Protect Journalists, a nonprofit based in New York. The majority, 111, were…