Why are Nigeria's labour unions striking again?

The Nigeria Labour Congress (NLC) and the Trade Union Congress (TUC) have today asked their members to down their tools indefinitely. The two, are Nigeria's biggest labour representatives. They accuse the government of failing to meet their demands. What do they want?Also, after the recent apology by German President, Frank-Walter Steinmeier where he expressed "shame" for the colonial atrocities his country inflicted on Tanzania, we look at Germany's colonial history across Africa.And we meet the African photographer Sarah Waiswa who is determined to show case the continent through a different lens.