Greece announced a plan Thursday to install a “floating wall” in the Aegean Sea to help curb the flow of migrants arriving on its islands’ shores from Turkey, according to reports.

Government officials are confident that a floating sea wall will successfully thwart refugees attempting to reach Greece’s northeastern islands, pointing specifically to a barbed wire-laden land ...

As the United States builds a $15 billion border wall, it is exploring adding a “Buoy Barrier System” to block river and sea crossings.

The administration wants to install floating border barriers that could be used to wall off river crossings and reservoirs along the international boundary with Mexico or extend U.S. fencing deeper ...