The U.S. Homeland Security department unveiled further measures last week to enhance security on flights entering the country.

China claims almost all of the South China Sea, including reefs and islands also contested by other nations.

Three Gulf states and Egypt have severed diplomatic and transport ties with Doha in a dispute that has raised concern across the Middle East and beyond.

North Korean leader Kim Jong Un said the test completed his country's strategic weapons capability that includes atomic and hydrogen bombs and ICBMs.