In prophase II, the nuclear envelope breaks down and the spindle apparatus forms.

Meiosis II: Prophase II
Meiosis II: Prophase II, Prentice Hall BioCoach Activity, Description and animation.
Prophase II
Prophase II, Macroevolution.net, Text and illustration.
Prophase ii
Prophase ii BiologyOnline.org A definition of prophase II.