Translation of Auslöser

Instead of focusing on the meeting between Clinton and Mubarak, the media prefered to talk about the birthday cake that Hillary Clinton received and about the visit of pyramids and other attractions.
Wars and struggles are always or mostly based on ignorance, fears and disrespect of the enemies. Unfortunately, the kind of hate which roots in previous wars never stops. Let me be clearer, please.
I went to the desk of Aerolineas Mexicanas and postponed my flight by two days. I did not have to get prepared as I had done some homework before coming here. The backup plan was Isla Mujeres.