LOL
Except on test ranges, all US nukes are supposed to be "one point safe". The criterion of one point safety is satisfied if, given that detonation of the warhead's high explosives has taken place at any one point, there is less than one chance in a million of obtaining a nuclear yield exceeding that equivalent to four pounds of HE.
To obtain a nuclear yield, a number of the famous lens shaped charges must be fired simultaneously to form a spherical implosion wave that compresses the plutonium core, increasing its density very suddenly, to satisfy the conditions for a chain reaction. If the charges don't go off at exactly the same time, you don't get a properly shaped shock wave, and the result is a nasty industrial accident instead of a wiped out city.