Two weeks after the Paris terror attacks, the French President leads a memorial.

FOX News' Simon Owen reports from the European bureau:

A rousing rendition of the French national anthem...

2,500 people gathering in Paris, including some of those injured in the attacks.

President Francois Hollande... Saying France will do everything to destroy what he called the army of fanatics responsible. Hollade has been trying to encourage a spirit of national unity, urging people to deck their homes in the French flag.

But a number of relatives of those killed in the attacks stayed away from today's ceremony, after accusing the government of failing to do enough to protect the country.

In London, Simon Owen, FOX News.