A driver killed more than 80 people and injured otherswhen he crashed a large truck into a crowd in Nice, France Thursday night.People had gathered in Nice for a celebration of Bastille Day.Nice is the fifth-largest city in France.It is a port city about 30 kilometers from the Italian border.About 350,000 people live there.The driver was shot and killed.Police identified him as a 31-year-old French-Tunisian who lived in Nice.Police said he was known as a violent person and longtime criminal.But security forces did not suspect him of having links to terrorist groups. The driver entered a street that was closed to traffic at the time.He crashed through a barrier, then drove through the crowd for up to two kilometers,speeding up and targeting people as they tried to flee.French President Francois Hollande spoke to the nation early Friday.He said "nothing will make us give way in the fight against terrorism."He talked about the terrorist attacks in Paris last November.He said all of France is being threatened by the Islamic State terrorist group.Hollande extended the country's state of emergency-- which was to end later this month -- for three months.He has also ordered 10,000 members of the militaryto help security forces throughout the country.And he said France will increase its roles in Syria and Iraq.This is the third large attack in France since last year.An attack in Paris in November killed at least 130 peopleand a series of attacks in January 2015that began with an assault on the offices of the magazine Charlie Hebdo killed 17 people.