Imagine shooting live bullets when fake ones were supposed to be used

This is the worst nightmare of most people in the defence services, especially during shows meant to showcase the abilities of the military. It is often necessary to stage events that are very realistic, such as the simulated saving of hostages from terrorists, fights with terrorists in urban landscapes, etc. In many such situations, the public can be very close by, having been already informed that the bullets being used are fake. Now imagine the panic and horror when these bullets are fired, but they are not fake, and are instead real ones. Such an incident happened recently in France, and resulted in punishments for many of the soldiers involved, including the moral-grounds resignation of the head of the French Army, General Bruno Cuche:

Paris: The head of France's army has resigned following a weekend shooting at a military show that injured 17 when real bullets were used instead of blanks, the French presidency said on Tuesday.
The defence minister, meanwhile, suspended the use of blank munitions at military shows for the public. Investigators are looking into Sunday's display of hostage-freeing techniques at the Laperrine military barracks in southern France. Most of those injured were civilians, and three were children.

This was apparently a mistake when the ammunition was being loaded; it however seems a clear case of negligence at the minimum since the concept of having live ammunition nearby when fake ammunition was supposed to be loaded (along with no cross-checking) seems a bit strange.

UN peace-keepers accused of child abuse

The world has come to depend on peace-keepers (deputed by the United Nations) to step in where individual countries and their forces cannot step in. Over the past few decades, the peace-keepers have gone to so many countries (especially in Africa) where they have come to represent the commitment of the international community to help out the citizens of countries that are having leadership or governance problems and need help. So it is all the more shocking that these same peacekeepers have been pointed out in a report as being responsible for many crimes such as the exploitation of young children, pornography, and trafficking of children:

Humanitarian aid workers and United Nation peacekeepers are sexually abusing small children in several war-ravaged and food-poor countries, a leading European charity has said. After interviewing hundreds of children, the charity said it found instances of rape, child prostitution, pornography, indecent sexual assault and trafficking of children for sex.
Save the Children says that almost as shocking as the abuse itself is the "chronic under-reporting" of the abuses. It believes that thousands more children around the world could be suffering in silence. In 2003, U.N. Nepalese troops were accused of sexual abuse while serving in the Democratic Republic of Congo. Six soldiers were jailed. A year later, two U.N. peacekeepers were repatriated after being accused of abuse in Burundi, and U.N. troops were accused of rape and sexual abuse in Sudan.

Such incidents are very shocking, and need a detailed investigation. The peace-keepers operate in regions where there is very little authority, and where people are even otherwise subject to all sorts of conditions; and if there are fears that they will start behaving in such a manner, trust will be lost.