Estonia on Wednesday signed a deal with Poland to purchase Piorun anti-aircraft missile systems, designed to target low-flying aircraft such as helicopters and drones.
"This is a historic moment...for our bilateral cooperation and for our cooperation in the defence field," Estonia's Defence Minister Hanno Pevkur said during a news conference in Poland.
"It's very important for us, for the region, for the region of the Baltic sea and especially for the NATO Eastern flank."
