#3 (or maybe #1?) still has not hatched.
From the Raptor Resource Project blogspot:
Thursday, April 07, 2016
Is the last egg going to hatch?
The last egg in the Original Decorah nest
As of this morning, the unhatched egg in Decorah is somewhere between 49 and 42 days old. Can it still hatch? Eagle eggs have hatched as late as 44 days after they were laid. If this is the last egg, we still have roughly two days in which hatch could occur. However, eggs have never hatched this far apart in Decorah before. Given the dates, it is possible that we've seen the hatch of eggs number two and three instead of eggs number one and two as we initially assumed. Roughly 3% to 12% of bald eagle eggs fail to hatch based on the studies I read, although some sources put the number a little higher, at 10% to 25%.
The rest of the article can be found here:
http://raptorresource.blogspot.com/
