Insurgents infiltrate across a long and poorly guarded border.

The South Koreans travelled by bus over the heavily guarded border to the Mount Kumgang tourist resort on Monday.

NATO has long complained that Pakistan has failed to prevent militants from crossly a long, poorly guarded border into Afghanistan.

Normally, it was easy to pass quickly through the closely guarded border crossing when I showed my press pass and West German passport.

Gropiusstadt was at the far end of Neukölln, in the south of West Berlin, hard on the guarded border, too near the East Berlin airport.