Captured Turkish cannon, Union Flag at half mast on Old Admiralty Building, Horse Guards Parade, Whitehall, London, England, United Kingdom, Europe

The Omani flag at half mast to signify the death of Sultan Qaboos at Ras Al Had Castle, Sultanate of Oman, Middle East

The Omani flag at half mast to signify the death of Sultan Qaboos at Ras Al Had Castle, Sultanate of Oman, Middle East

Historic timber-framed houses in Arnis on the Schlei River, flag of Schleswig-Holstein, Bad Arnis, Schleswig-Holstein, Germany, Europe

Dramatic half mast american flag among trees

USA, Washington DC, South Portico of the White House with the Stars and Stripes flag flying at half mast.

USA, Washington DC, Capitol Building, Angular view of the central section with the dome and American flag at half mast.

USA, Washington DC, Capitol Building, Section of the building's dome with the American flag at half mast.

USA, Washington DC, South Portico of the White House with the Stars and Stripes flag flying at half mast.

USA, Washington DC, Capitol Building, Section of the building's dome with the American flag at half mast.

USA, Washington DC, Capitol Building, Head on view of the central section with its dome and American flag at half mast.