More police can help with theft, possibly with solving murders. It will do almost nothing to prevent terrorist attacks. This airport attack is a prime example o

More police can help with theft, possibly with solving murders. It will do almost nothing to prevent terrorist attacks. This airport attack is a prime example of the reason why. You can put large checkpoints everywhere, but there will always be, by definition, a line of people that haven't yet passed the checkpoint and this is where they will attack.