DOVER, August 9, 2011 (AFP) – US President Barack Obama made a solemn trip to a Delaware air base Tuesday as remains of 30 US servicemen killed in an helicopter crash in Afghanistan were returned home.

Obama arrived at the base for the unannounced visit after two C-17 military aircraft landed carrying unidentified remains of those killed Saturday on a special forces mission in the deadliest such incident of the Afghan war.