But it is British vehicles, clearing the route for an Afghan push, that sustain damage when a number of the homemade bombs detonate.

BBC: Can the Afghan army take the lead in battle?

But it can also be good for kids to feel bad about themselves temporarily, if they behave in selfish, mean or hurtful ways that might damage their ability to sustain relationships or hold a job in the future, he says.

WSJ: The Right Level of Self-Esteem for a Child