guided missile

involvement

be involved in, be engaged, enter the picture

guidance; leading / (medicine, physics, chemistry) induction

guide, lead, coax / (medicine, physics, chemistry) induce

projectile

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

development or exploitation of natural resources etc. / development or creation of new technology, drugs, or products / development or cultivation of talent or ability

to develop or exploit resources / to develop or create new products or fields / to cultivate talent or ability

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend