U. s. officials , in the days since monday 's nuclear test , have vowed to strengthen international bodies focused on intercepting north korean ships and planes believed to be ferrying arms .
It 's also possible that such access could provide an avenue for eavesdropping on phone calls or intercepting emails in combination with other technologies , according to an industry specialist .
The nga is the u.s. government 's main mapping agency responsible for satellite and other imagery while the nsa is its super-secret electronic eavesdropper , tasked with monitoring and intercepting communications around the world .
Israel claims , too , that its iron dome anti-missile system has proven a huge boon , intercepting more than 400 missiles , according to mr barak , out of 500 attempts .
Like many countries , japan has a long-standing policy of intercepting unidentified or potentially hostile aircraft entering its air defense identification zone , or adiz , which extends 200 miles from its shores .