Alright, solution for killing someone with regeneration:

Titan II Warhead

History of the Minuteman ICBM Missile System . ... of the LCC, a two-person crew was on duty 24 hours a day. Launch Facility ... generation, liquid-fueled Titan II sites have survived. ... burned a mixture of liquid fuel and oxidizer. ... "kill capacity" was eight times that of Minute ... activate a hand-pumped oxygen regeneration.

Explanation:

answer; mental health prevention programs;

answer; the above statement is (true);