was there any consensus on the meaning of In the line of FIRE?

Possibilities?

Clint Eastwood movie about USSS who was unable to stop assassination of JFK and now is trying to stop one against current POTUS.

https://www.rottentomatoes.com/m/in_the_line_of_fire/

Book title by former Pakistani president Musharaff:

https://www.goodreads.com/book/show/141550.In_the_Line_of_Fire

Is NBC somehow connected?

>>2627375

Here's another.

In the Line of Fire TV Series Heads to NBC

By Silas Lesnick

ON September 18, 2015

https://www.comingsoon.net/tv/news/614585-in-the-line-of-fire-tv-series-heads-to-nbc