Planning a missile strike by drawing a crude world map with an explosion (labeled "explosion") is like planning a killing spree by drawing a stick figure with an uzi in each hand mowing down other stick figures.
Funny/Scary. Imagine that instead of the nuclear war map, the landlords encountered the image you described. OP would be in detention/questioning right now.
Zero tolerance public schools have taught us that anyone who can draw a gun is a terrorist.