23 April 2015 From the section Africa In our series of letters from Africa, Joseph Warungu senses a new wind blowing across Kenya following the attack by Somalia-based al-Shabab militants on Garissa university earlier this month. We will not forget Garissa. This statement summarises the mood in Kenya three weeks after the attack on Garissa University College in the north-east of the country, which killed 148 people. Ever since the country's first major terror attack - the 1998 bombing of the US embassy in Nairobi - Kenyans have stoically absorbed the impact of each assault with a three-step reaction: Shock, anger, and then a shrug.'Defiant church' First there is shock at the audacity of...