President Donald Trump says the U.S. nuclear arsenal has been beefed up since he took office in January. Not quite.

As the world digested the president's remarks on Tuesday threatening to unleash "fire and fury" on North Korea, Trump said in a tweet Wednesday, "My first order as President was to renovate and modernize our nuclear arsenal. It is now far stronger and more powerful than ever before."

Nuclear policy and military analysts say nothing of the sort has taken place, and the only plan in the works — initiated by former President Barack Obama — has a 30-year timeline and an estimated $1 trillion cost. Most of that spending would come after 2022.