More than 40 world leaders congregated in Paris on Sunday to show their support and solidarity with France after a week of terrorist bloodshed that left 17 dead, The Guardian reports.

Presidents, prime ministers, statesmen and women travelled by bus to join a largely silent march to honour the victims and heroes of the three attacks, among them French President Francois Hollande, German Chancellor Angela Merkel, Palestinian leader Mahmoud Abbas, Israeli Prime Minister, Binyamin Netanyahu, UK Prime Minister David Cameron, Ukrainian President Petro Poroshenko and others.

The crowd around them was estimated to number more than 1 million, under the watchful eye of 2,200 heavily armed police and gendarmes, including crack snipers on the surrounding roofs, and helicopters.

The three days of terror began Wednesday when brothers Said and Cherif Kouachi stormed the newsroom of Charlie Hebdo, killing 12 people.