IT'S a trip no one wishes to talk about. Which is surprising, given its significance. For, by all reckoning Mossad, the Israeli secret service, probably is the most effective anti-terrorist strike force in the world. A fact Home Minister L.K. Advani readily acknowledged before he left for his first-ever official visit to Tel Aviv in June this year. But despite the emerging new equations with that country, eyebrows did go up when a team of six Israeli security personnel recently landed in Delhi and proceeded to Kashmir. After all, should India take the help of a country not friendly with the Arabs, and that too in security matters?