where you guysyseaded?emale announcer ] whitening without the wait. 3d white two hour express whitestrips...from crest. life opens up p wh you do. and try 3d white toothpaste and rinse. host: could switching to geico 15% or more on car insurance? host: do dogs chase cats? ♪ 70's era music sfx: tires squealing .. vo: geico. 15 minutes could save you 15% or more on car insurance. spring. the revolutions that have swept the middle east and changed the game right across the world. oil, terrorism. the relationship between islam and ristianity. it's all at stake. so, what forces have been unleashed there and what will happen next? that's the topic of tonight's "nightline" interview with author bruce feiler. what a year. history is hurtling ahead in the muslim world. month after month of turmoil and upheaval, in egypt. . in libya. in syria. right across the arab world, the people are rising. and everything, it seems, is changing. >> through the moral force of nonviolence, the people of the region have achieved mor