Poles turn out to mourn president
Tens of thousands of mourners massed in a historic Warsaw square on Saturday for a public memorial service for president Lech Kaczynski and the 95 others killed in an air crash a week ago. The sombre ceremony came as a volcanic ash cloud from Iceland further disrupted air travel and threatened to keep world leaders, including US president Barack Obama, from Kaczynski's state funeral in Krakow on Sunday.