Another (Techno) Thrilling First Line

I'm onto a Clancy (sanctioned) techno-thriller. This time Threat Vector. It's a typical and expected beginning to a typical and expected Clancy novel.

The five Americans had been lying low in the decrepit hotel room for hours, waiting for nightfall. 

Sheets of warm rain rapped on the window, generating the majority of the sound in the dim room, as there was little talk among the men. This room had served as the base of operations for the team, though four of the five had stayed at other hotels throughout the city during their weeklong stay. Now that preparations were complete, those four had checked out of their quarters and consolidated their gear and themselves here with the fifth man in their group. 

Though they all were still as stones now, they had been a blur of activity over the past week. They had surveilled targets; developed op plans; established covers; memorized their primary, secondary, and tertiary exfiltration routes; and coordinated the logistics of the mission to come. 

But preparations were now complete, and there was nothing left to do but sit and wait for darkness.

Clancy, Tom; Greaney, Mark - Threat Vector

What I can never be sure of is, which first line to take? The prologue first line:

These were grim days for former operatives of the Jamahiriya Security Organization, the dreaded national intelligence service of Libya under Moammar Gaddafi. Those members of the JSO who had managed to survive the revolution in their home nation were now scattered and in hiding, fearing the day when their cruel and brutal past would catch up with them in a cruel and brutal way.

Or the first line from chapter 1. I chose chapter 1 if only cause the prologue one was so damn boring. I guess Greaney and Clancy split the difference. One on the "good first lines" list (here) and the other on the "bad first lines" list (here).