There are protections, but not for 'probationary' employees (anyone who's been hired or transferred within the past X months).
As for the rest, they're not 'being fired', they're 'being placed on administrative leave', which is a paper-thin excuse but one that will have to wind its way through the court system like all the other bullshit the administration is pulling.
As for the rest, they're not 'being fired', they're 'being placed on administrative leave', which is a paper-thin excuse but one that will have to wind its way through the court system like all the other bullshit the administration is pulling.