Is Donald Trump right to believe that Iran's nuclear facilities have been 'completely obliterated'?

Donald Trump said Iran's key nuclear facilities had been completely "obliterated". Isreal, for its part, said its nuclear program was substantially hit, adding that we needed to wait for full details to emerge: how likely is Trump's claim to be accurate? Answer by Alexandre Vautravers, Editor-in-Chief of the Revue militaire Suisse and scientific director at CHPM.