army
barb
barbed
barbed wire
barbwire
barrier
border
chain
chain link
chain link fence
chained link
chained link fence
clip art
clipart
convict
cutout
danger
design
detain
drawing
enclose
enclosure
fence
freedom
gate
graphic
illustration
isolated
isolation
jail
keep in
keep out
link
linkage
penal system
points
political prisoner
pow
prison
prisoner
security
sharp
silhouette
strong
torture
wall
war
wire