Are you aware that the American Heart Association has once again changed it's CPR protocol? You may have previously learned the ABCs. Once ensuring that the scene is safe and establishing that the victim is unresponsive you would proceed to address their airway followed by two breaths and 30 compressions. NOW we are being taught CAB! As always, ensure the scene is safe and call for help. Spend no more than 5-10 seconds establishing the victim isn't breathing. BEGIN GIVING COMPRESSIONS IMMEDIATELY! The new thought is that there is enough residual oxygen in your system - manual compressions will get it moving - by skipping two breaths you get it moving quicker.