Obama opened today Nuclear Security Summit with focus on IS (Islamic State).
With a welcome dinner at White House, the U.S. leader opened the fourth Nuclear Security Summit.
This Summit will focus on terrorist groups like the Islamic State (IS) have access to nuclear materials that some countries have for its civil or military use.
If the terrorists have access to these materials, they can use them to make an atomic weapon.
Nuclear Security Summit is held every two years since 2010 on initiative of Obama.
At the beginning of his term, the President promised to become a priority nuclear non-proliferation.
He did not make statements during the opening dinner of the Summit, but Obama met with his French counterpart, Francois Hollande.
The two leaders analysed ways to strengthen bilateral to fight against terrorism and to prevent further attacks as Brussels and Paris attacks.
Islamic State (IS), who claimed both attacks, must be corralled in Iraq and Syria, said Obama during this meeting with Hollande.
The possibility that Islamic State or another terrorist groups get a nuclear weapon will focus the meeting on Friday.
Precisely, main meeting of the Summit is on Friday, which leaders and ministers from 52 countries attend.