LONDON: At a sports ground in London, Maya Hassan watches proudly as around 30 women, almost all Muslim and from ethnic minorities, join a self-defence class she has organized in response to a wave of riots that have faced violent, racist attacks on Muslims and migrants. The 28-year-old martial arts expert said she wants to help women of color learn to deal with abuse and build bonds and confidence after more than a week of riots targeting mosques, hotels for asylum seekers and police.