A woman reacts after she is reunited with her daughter (R) in Niairobi on April 04, 2015, a survivor of an attack by islamist gunmen claimed by al-Shabab on a university campus in Garissa, nothern Kenya. Kenya's President, Uhuru Kenyatta vowed Saturday, to retaliate in the severest way against Somalia's al-Shabab islamists after they massacred nearly 150 people at a university . AFP PHOTO/Tony KARUMBA        (Photo credit should read TONY KARUMBA/AFP/Getty Images)