Hi All,
I am an admitted newbie with MS Office and don't even know if that's the right terminology in the subject line. So here goes...
I have a 99 page Word doc of over 700 (Twitter) tweets in which I would like to do a Replace (deletion, actually) for all date/time stamps, all returns, and all URLS. So that this below:

2011-05-13 18:56:15
http://cnet.co/k0kvkG Sorry, but unless it's from their own
home, anyone who broadcasts their location in real-time is an idiot.

2011-05-13 18:45:35
Sorry, (PC/Android) tablet makers: iPad (2) is STILL King of
the Hill-over a year later.

Will look like this:

Sorry, but unless it's from their own
home, anyone who broadcasts their location in real-time is an idiot.
Sorry, (PC/Android) tablet makers: iPad (2) is STILL King of
the Hill-over a year later.

(Almost all URLs have been shortened by bit.ly.) Many thanks in advance!