Actually, we don't.
Three types of ERW were built by the United States.
The W66 warhead, for the anti-ICBM Sprint missile system, was produced and deployed in the mid 1970s and retired soon thereafter, along with the missile system.
The W70 Mod 3 warhead was developed for the short-range, tactical Lance missile, and the W79 Mod 0 was developed for artillery shells.
The latter two types were retired by President George H. W. Bush in 1992, following the end of the Cold War.
The last W70 Mod 3 warhead was dismantled in 1996, and the last W79 Mod 0 was dismantled by 2003, when the dismantling of all W79 variants was completed.
But don't worry, Russia, China, and even Israel have them aplenty.
it is probable that China has a stockpile of neutron bombs, Russia has neutron bombs and Israel has hundreds of neutron weapons.
My bad, I do not follow that area.
I gather we could make a lot of better stuff, if we absolutely had to.
The root cause, of course, is the Muslin mind set.
If a Muslim President (their point of view) and countless apologies do not turn that mindset, we need to evaluate how to protect our life and liberty