1.   Caldera also has asked the National Academy of Sciences to examine the corps study.

2.   The charges from Sweeney also led to congressional hearings and a separate National Academy of Sciences review of the corps study.

3.   The panel suggested that all large corps project studies be subject to outside review, an idea the corps has resisted.

4.   The panel said it did not attempt to conclude whether the corps study had been rigged.

5.   The subject of a years-long, fierce debate, the corps study is expected to be finished this year.