"He knew nothing about politics." A father talks to Humphrey Hawksley about his only son, killed in a street protest in the Egyptian city of Alexandria. Will Grant in Mexico on the Central American migrants who face abuse at every turn as they try to make their way to the United States. A fishing community in Alaska is engaged in a bitter battle with the mining industry - Stephen Sackur says it's dividing opinion in this wild and sparsely populated territory. Sarah Toms on the mums and dads in Singapore going to school so they can help their children with the homework. And Lyndsay Johns crams into a minibus taxi in South Africa and finds out about the highs and lows of a morning commute in Cape Town.