Declassifying Clarke

Republicans in Congress are moving to declassify testimony that Richard Clarke gave to the House and Senate intelligence committees in July 2002 for the purpose of determining whether Clarke committed perjury, either in that testimony or in the testimony he gave, also under oath, to the terrorism commission.
Sounds like a good move. We know that last year, Clarke told the exact opposite of his current story to reporters in a briefing. If his 2002 testimony covered the same subjects, he presumably was telling the same thing to the committees. A perjury charge is extremely unlikely, but it would be good to find out whether Clarke has not only contradicted himself, but has contradicted himself under oath.