Poland Leaves Ottawa Convention to Use Mines
Poland joined Finland, Estonia, Latvia, Lithuania, and Ukraine in leaving the treaty.
Poland plans domestic mine production and stockpiles under Eastern Shield.
Prime Minister Donald Tusk showcased Bluszcz vehicle.
Poland reversed 2016 stockpile destruction to resume mine manufacturing.
Human rights groups condemned the withdrawal from Ottawa Convention.
Poland says mines will be used only in real threats, and anti-tank mines aren't banned.