Imagine that you have a piggy bank where you save all your allowance money. Now, imagine that one day, a big bully comes and takes all your money from the piggy bank. You feel really sad and angry because you worked hard to save that money.
Now, someone comes and helps you get your money back from the bully. You feel happy again, but your piggy bank is not as full because some of the money is missing.
In post-invasion Iraq, something similar happened. The country was invaded by a big bully (the military of another country) and many things were destroyed. The people in Iraq worked hard to rebuild their country, but they needed money to do so.
Some people saw this as an opportunity to invest in Iraq. Investing means giving money to someone or something with the hope of making a profit (earning more money in the future).
Investors could give money to people in Iraq to start businesses or to help rebuild buildings, roads, and other things. If the businesses did well, the investors would earn a profit.
However, investing in post-invasion Iraq was risky because the country was still unstable and there were still people who were unhappy with the situation. There was a chance that the money invested could be lost if something bad happened.
So, investing in post-invasion Iraq was like giving your allowance money to someone to start a new business, but there was a chance that you might not get that money back if the business failed or something bad happened.