Honor The Leader
When touring national monuments, most, if not all, tour groups are instructed to kneel gravely and offer flowers in front of statues of Kim Il Sung on one or two times. When dealing with photographs of North Korean leaders, always be respectful. It is also one of the things about North Korea you should know before travelling.
If you don't think you can obey the regulations, be respectful, and keep any bad ideas or opinions to yourself, you should think twice before visiting North Korea.
Disrespect for North Korea's current and former leaders, Kim Jong-Il and Kim Il-Sung, is a crime in the country. People who break North Korean rules, even unwittingly, risk being exiled, arrested, or imprisoned.