Iraqis still ask if U.S. invasion was worth it

Five years after U.S. and British forces swept into Iraq and toppled Saddam Hussein, many Iraqis are asking if the violence and upheaval that turned their lives upside down was worth it.

The human cost is staggering -- anywhere between 90,000 and 1 million Iraqi civilians killed, according to various estimates; nearly 4,000 U.S. soldiers dead; while 4 million Iraqis are displaced.

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