Despite helping Wałęsa in 2005 to receive the official status of a " victim of communist regime " from the Institute of National Remembrance ( IPN ) , this court ruling did not convince many Poles . In November 2009 Wałęsa sued the president of Poland , Lech Kaczyński over his repeated collaboration allegations . Five months later , Kaczyński failed to invite Wałęsa to the commemoration service at Katyn , which almost certainly saved Wałęsa 's life because the presidential plane crashed , killing all on board . In August 2010 , Wałęsa lost a libel case against Krzysztof Wyszkowski , his former fellow activist , who also publicly accused Wałęsa of being a communist agent in 1970s
Katyn
Katyn massacre
Lech Wałęsa