Complex sentence: In this period, notable issues were related to the extrajudicial detention of captives in the Guantanamo Bay detention camps in Cuba as well as increasing U.S. tensions with Venezuela under Hugo Chavez, and increasing cooperation between the U.S. and Mexico against drug cartels.
Split into simpler sentences: In this period, notable issues were related to the extrajudicial detention of captives in the Guantanamo Bay detention camps in Cuba. Other issues were increasing U.S. tensions with Venezuela under Hugo Chavez, and increasing cooperation between the U.S. and Mexico against drug cartels.