How do you fire atomic bombs?

In many hollywood films you can see how a suitcase is opened with a laptop and with a button you can fire the atomic bombs is that also the case in reality?

No, just nonsense. It made pffft, that's it.

It takes critical energy, otherwise nothing will ignite.
Nothing would happen to a Silverster cracker.

The laptop can certainly give the impetus for the explosion. I don't know how small an A-bomb can be.

The smallest ever built is called "Davy Crockett" and can be started off the shoulder like an RPG.

Yes, that is possible.

In a submarine, for example, you actually have to turn two keys and enter a code.

The bombs on Hiroshima and Nagasaki were simply dropped from the plane.

The US President has a suitcase that is flippantly called "Football".

https://en.wikipedia.org/...r_football

However, it is essentially only used for authentication. It is not a communication device. Once authenticated, the kill order can in principle be issued on any medium, including WhatsApp, if need be.

https://en.wikipedia.org/...ction_Link

How the shooting then actually takes place depends on the weapon system. In the case of ICBMs, whether land-based or submarine-based, as far as I know, they are still the two notorious keys. In any case, the actual shooting takes place by appropriate military personnel on site, i.e. In a bunker near the silo, by the captain of the submarine and another officer, by the aircraft crew and so on.

With the other nuclear powers, it will work in a similar way.

https://www.washingtonpost.com/posteverything/wp/2016/12/01/no-one-can-stop-president-trump-from-using-nuclear-weapons-thats-by-design/