Lined with Doric columns, its centerpiece is a 9-foot bronze sculpture of a seven-man bomber crew returning from a mission cast by Philip Jackson, whose work includes a monument to the late Queen Mother.

WSJ: Bomber Command Memorial | They Were the Means of Victory | By Richard Holledge

Mr. Zarghun said the bomber was an Afghan man from the province of Logar, just south of Kabul.

WSJ: Deadly Blast Hits Afghan Capital

Bulgarian officials on Thursday released CCTV footage of a man they suspect was the bomber.

BBC: Bulgaria blast: 'Suicide bomber' killed Israelis