Boston bombs: Still many unanswered questions, says Obama
President Obama has said the nation owed a debt of gratitude to law enforcement officials and the people of Boston for their help in the search for the two suspects in the marathon bomb investigation.
Speaking after police detained the surviving suspect Dzhokhar Tsarnaev, Mr Obama said there were still many unanswered questions.
20 Apr 2013
- From the section US & Canada