A Somali police officer arrests a suspected rebel member of the al Qaeda-affiliated al Shabaab among beach goers in Mogadishu. Al Shabaab claimed responsibility for today's pre-dawn attack on a Kenyan university campus near the Somali border. The following gallery examines who is al Shabaab. Here: Somali police officer (R) arrests a suspected rebel member (L) of the Al Qaeda-affiliated al Shabaab among beach goers at the Lido beach north of Somalia's capital Mogadishu March 23, 2012. (Photo by Feisal Omar/Reuters)

(L-R) Playmate Victoria Silvstedt, Donald Trump and Melania Knauss at the Playboy 50th Anniversary celebration December 4, 2003 in New York City. (Photo by Peter Kramer/Getty Images)

Military Personnel sing and dance during celebrations for Independence Day in Dakar on April 4, 2022. Senegal Celebrates its sixty second Independence Day after gaining independence from France in 1960. (Photo by John Wessels/AFP Photo)

A man helps an elderly woman to run for cover after heavy shelling on the only escape route used by locals, while Russian troops advance towards the capital, in Irpin, near Kyiv, Ukraine on March 6, 2022. (Photo by Carlos Barria/Reuters)

People carry bags containing their belongings past a burning residential block, caused by a recent shelling according to locals, on the outskirts of Donetsk, eastern Ukraine February 9, 2015. (Photo by Maxim Shemetov/Reuters)

A reveller from Unidos do Viradouro samba school performs during the first night of the Carnival parade at the Sambadrome in Rio de Janeiro, Brazil, April 23, 2022. (Photo by Amanda Perobelli/Reuters)

Alexia Putellas of FC Barcelona celebrates victory with fans following the UEFA Women's Champions League Quarter Final Second Leg match between FC Barcelona and Real Madrid at Camp Nou on March 30, 2022 in Barcelona, Spain. (Photo by Alex Caparros – UEFA/UEFA via Getty Images)

Members of the O’Neill and Gallagher families from Sydney, Australia take to the water at the 40 Foot for a Christmas Day Swim in Ireland on December 25, 2022. (Photo by Alan Betson/The Irish Times)