Can the US do 100m inoculations in 100 days?

https://www.cnbc.com/2021/01/24/cdc-director-government-does-not-know-how-much-covid-vaccine-the-us-has.html

Biden has a very ambitious plan to do 100m inoculations in 100 days but it looks increasingly difficult to achieve.  Why?

This is because the US doesn't know how many covid vaccines it has and it also doesn't have a distribution plan in place.

https://www.usnews.com/news/top-news/articles/2021-01-24/trump-administration-had-no-coronavirus-vaccine-distribution-plan-white-house

Therefore, Biden has to start a distribution plan with a clean slate and this will be time-consuming.  I foresee great difficulty in achieving the goal of 100m doses and Biden will under-deliver his presidential promise.