I am reading through all the changes. The ones in 2008 were to the 1978 law. Not the one Bush did in 2001. WHY? Might need to wait until morning. Brain too tired tonight
Start here with 1978 one and it links to all further ones. What specifically did he do that made him able to use FISA 13.000 times.
en.wikipedia.org/wiki/Foreign_Intelligence_Surveillance_Act