September 15, 2016 5:57 AM EDT

MALAYSIA

Prime Minister Najib Razak and his Thai counterpart, Prayut Chan-o-cha, met on Sept. 9 to discuss building a wall along the border dividing their countries in an attempt to control transnational crime.

ISRAEL

Israeli officials said Sept. 7 that they had begun building an underground wall along the 37-mile Gaza border. The structure is intended to thwart Hamas militants who have used tunnels to launch attacks.

HUNGARY

Prime Minister Viktor Orban said Aug. 26 that Hungary would build “a more massive” structure on its border with Serbia. It will reinforce an existing razor-wire fence, which was built to reduce the flow of migrants.

NORWAY

The Scandinavian country announced Aug. 24 that it was erecting a 660-ft. steel fence at its northern Skorskog border point with Russia to deter migrants from entering the country via the Arctic Circle.

KENYA

Construction of a 435-mile wall on Kenya’s northeastern border with Somalia resumed in March. Authorities want to keep out al-Shabab militants, who have launched deadly terrorist attacks in Kenya.

UKRAINE

The country began building a wall along its border with Russia in 2014 in an attempt to stem alleged flows of aid for pro-Russian forces in Ukraine. As of August 2015, less than 10% had been completed.

This appears in the September 26, 2016 issue of TIME.

Contact us at letters@time.com.

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