▁their ▁existence . ▁ ▁Cl imate ▁The ▁climate ▁in ▁this ▁area ▁is ▁character ized ▁by ▁hot , ▁hum id ▁sum mers ▁and ▁generally ▁m ild ▁to ▁cool ▁winter s . ▁ ▁According ▁to ▁the ▁Kö ppen ▁Cl imate ▁Classification ▁system , ▁B ens ▁Run ▁has ▁a ▁hum id ▁subt rop ical ▁climate , ▁abbre vi ated ▁" C fa " ▁on ▁climate ▁maps . ▁ ▁References ▁ ▁Category : Un in cor por ated ▁communities ▁in ▁Ty ler ▁County , ▁West ▁Virginia ▁Category : Un in cor por ated ▁communities ▁in ▁West ▁Virginia ▁Category : West ▁Virginia ▁populated ▁places ▁on ▁the ▁Ohio ▁River <0x0A> </s> ▁A ▁circum l un ar ▁traject ory , ▁trans - l un ar ▁traject ory ▁or ▁lun ar ▁free ▁return ▁is ▁a ▁type ▁of ▁free ▁return ▁traject ory ▁which ▁takes ▁a ▁space craft ▁from ▁Earth , ▁around ▁the ▁far ▁side ▁of ▁the ▁Moon , ▁and ▁back ▁to ▁Earth ▁using ▁only ▁gravity ▁once ▁the ▁initial ▁traject ory ▁is ▁set . ▁ ▁History ▁ ▁The ▁first ▁space craft ▁to ▁fly ▁a ▁circum l un ar ▁traject ory ▁was ▁L una ▁ 3 . ▁Circ um l un ar ▁traject ories ▁were ▁also ▁used ▁by ▁Apol lo ▁miss ions ▁prior ▁to ▁lun ar ▁orbit ▁insert ion , ▁to ▁provide ▁a ▁free ▁return ▁to ▁Earth ▁in ▁the ▁event ▁of ▁a ▁prop ulsion ▁system ▁mal function ▁on ▁the ▁way ▁to ▁the ▁Moon . ▁This ▁was ▁used ▁on ▁Apol lo ▁ 1 3 , ▁when ▁an ▁o xygen ▁tank ▁ru pt ure ▁necess itated