." >>> i'm willie james inman in washington. thanks for staying with us.rs ago this week that u.s. forces invaded iraq with a mission to topple the government of saddam hussein. then-secretary of state colin powell had gone before the united nations detailing u.s. intelligence claims that iraq was building and stockpiling weapons of mass destruction. all of those claims turned out to be false. and while operation iraqi freedom led to saddam's overthrow and execution, the price was steep. $2 trillion spent. about 4,500 u.s. personnel killed. another 32,000 wounded. charlie d'agata covered the conflict from the very beginning and is back in baghdad. >> reporter: a very different baghdad than 20 years ago. when i first came here, people were still living in fear under saddam hussein. then the invasion, the fighting, the rise and fall of isis, the violence has now subsided, but it's taken a horrific toll. 20 years since shock and awe. 20 years since that night air strikes and cruise missiles lit up the skies over baghdad, paving the way for u.s. ground troops