Regarding 3), FISA allows, as of the 2008 amendment, a period of 7 days surveillance before obtaining a warrant. Failure to then obtain a warrant means the info

Regarding 3), FISA allows, as of the 2008 amendment, a period of 7 days surveillance before obtaining a warrant. Failure to then obtain a warrant means the information obtained cannot be used as evidence (unless "the United States Attorney General believes the information shows threat of death or bodily harm") but that's more than enough time to dig through their email/phone content.