Reuters, July 10 - 2000 BERLIN - Thousands of Iranians demonstrated in Berlin on Monday against a visit by President Mohammad Khatami despite tight security and incessant rain. The National Council of Resistance of Iran (NCR) said over 20,000 people had attended the rally, while 10,000 had been prevented from getting there. The protesters beat drums, waved Iranian flags without the central Islamic symbol and carried banners with slogans such as "Trade with the mullahs hurts human rights." Paintings portrayed Khatami with vampire teeth and breathing fire.Huge screens showed satirical political videos, while men dressed as imams led others...