Al Qaeda is ready to drop a nuke or two on us Americans:

“God willing, the nuclear weapons will not fall into the hands of the Americans and the mujahideen would take them and use them against the Americans,” Mustafa Abu al-Yazid, the leader of al Qaeda’s in Afghanistan, said in an interview with Al Jazeera television.

Note that the simplest type of nuclear weapon, the gun-type fission weapon, is essentially a cannon that fires one chunk of enriched uranium at another. It isn’t brain surgery. The hard part is getting the enriched uranium. Thankfully for terrorists, there is enriched uranium at facilities in the former Soviet Union that is “kept safe” only by a couple poorly-paid night guards, and Pakistan is politically unstable.

See the Nuclear Threat Initiative for more information. Thankfully, President Obama takes the threat seriously (unlike many of my commenters), and he met with this group recently to talk about moving towards a world free of nuclear weapons.

Several million degrees in a fraction of a second. Thankfully I live in foggy San Francisco. Fog has the potential to absorb a lot of energy from a thermal pulse. Also, since San Francisco is on the West Coast, and the prevailing wind goes east, fallout from any ground-level explosions will be dispersed away from my location. Others might not be so lucky.