Here are the possible solutions for smart bomb's guide clue
Answer
Clue
Relevancy
iran
Clue
"Bomb bomb bomb, bomb bomb ___"
"Bomb, Bomb ___" ("Barbara Ann" parody sung by John McCain)
laser
Clue
Smart bomb's guide
Definition
a source of high-intensity optical, infrared, or ultraviolet radiation produced as a result of stimulated emission maintained within a solid, liquid, or gaseous medium