Complex sentence: In 2011, Obama announced that al-Qaeda leader Osama bin Laden was killed by U.S. forces during a covert operation in Pakistan while the Iraq War was declared formally over the same year.
Split into simpler sentences: In 2011, Obama announced that al-Qaeda leader Osama bin Laden was killed by U.S. forces during a covert operation in Pakistan. The Iraq War was declared formally over the same year.