MOGADISHU (Reuters) - The heads of Somalia s police and national security have been sacked after a bombing targeting a hotel in the country s capital claimed at least 29 lives, state radio reported on its website on Sunday.    Somalia s police commander General Abdihakin Dahir Saiid and director general of the National Intelligence Security Agency (NISA), Abdullahi Mohamed Ali, have now been sacked after a cabinet meeting,  state radio reported.   