Penny Lawrence at Oxfam House in Oxford, in 2016. Lawrence, who was the U.K. charity's deputy chief executive, stepped down Monday amid a growing scandal over aid workers who paid for sex in Haiti and Chad.
Charlotte Ball / Oxfam/Charlotte Ball / Oxfam
Helmeted Chadian and other African police commandos, armed with dummy rifles hunt down terrorist suspects who've taken hostages in the building, during a US military led Flintlock 2017 law enforcement exercise in Ndjamena Chad, 15 March 2017.
Hissene Habre, the former president of Chad, waves as he leaves a courthouse in Dakar, Senegal, on June 3. Habre was ousted from Chad in 1990 and has lived in exile in Senegal ever since.
An armored vehicle used by Boko Haram militants captured by the Nigerian military in Maiduguri, Borno state, late last month. The extremist group appears to be expanding its operations into neighboring countries in an effort to establish an independent Islamic state.