Je remercie Jean-Marc Labat de son explication. Effectivement j'ai trouvé la trace de ces crises cardiaques qui auraient d'ailleurs motivé HDG à démissionner en 1989 mais il serait resté à la demande de Kohl pour négocier la réunification.
Mais j'ai aussi trouvé cela :
"Baker wanted to discuss his concerns with Genscher, but could the German foreign minister be trusted? A rumor was circulating that Genscher, a member of the liberal Free Democratic Party (FDP), was a man of the East, that he had connections to the KGB and the Stasi. Conservative US politicians and diplomats had started the rumor and some members of Germany's CDU and its Bavarian sister party, the Christian Social Union (CSU), were playing along. According to one of his close associates, even Kohl had his suspicions about Genscher.
The US intelligence agencies had long had their eye on Genscher, who had fled to the West in 1952, because he continued to make trips to his native Halle, a city in south-central East Germany, even though he had once served as interior minister and was thus in charge of West Germany's domestic intelligence agency. A senior US intelligence official argued that their suspicions were justified by the fact that Genscher was the only interior minister from the West who had traveled to the East on a regular basis. This only heightened some Americans' suspicions of Genscher's meetings with Shevardnadze in the spring of 1990, some of which lasted for hours, once in March, twice in May and four times in June."http://www.spiegel.de/international/ger ... 848-6.html