According to the FBI, there were 1.2 million violent crimes committed in the US during 2011.
According to the UK government, there were 1.94 million violent crimes in the UK during 2011.
There are almost exactly five times as many people in the US as in the UK – 314 million vs. 63 million.
The violent crime rate in the UK is 3,100 per 100,000, and in the US it is 380 per 100,000 population.
For some reason, Piers Morgan doesn’t talk about this.