Complex sentence: Geiszler warns the two Jaegers that they must take a Kaiju into the Breach with them for the attack to succeed, and Pentecost decides to detonate his bomb immediately to clear a path to the portal for Raleigh and Mako.
Split into simpler sentences: Geiszler warns the two Jaegers that they must take a Kaiju into the Breach with them for the attack to succeed. Pentecost detonates the bomb in order to clear a path to the portal for Raleigh and Mako.