The body of Polish President Lech Kaczynski – who died along with 95 others when their plane crashed in Russia – has arrived back in Warsaw.
It was driven through crowd-lined streets to the presidential palace, where it will lie in state for a week.
The president, military chiefs and MPs were due to attend a memorial for a World War II massacre when their plane crashed near Smolensk on Saturday.
Russian officials say the pilots were warned that they were flying too low.
Russian Prime Minister Vladimir Putin earlier attended a memorial service for the victims at the crash site, near the city of Smolensk.
He has said he would personally oversee the investigation into the disaster, promising to find out what happened as soon as possible.