Julio Acevedo, the man wanted by police in New York in connection with a hit-and-run accident that killed an expectant couple, told New York's Daily News he was fleeing a gunman who was trying to shoot at him.
The couple's baby was delivered prematurely after the crash on Sunday, but later died.
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The German bomb - a 500kg device - was spotted by a barge carrying out dredging works, the Royal Navy said.
The study found children born in the 1980s have found it much harder to build up wealth in housing and pensions as they age.
The singer ended speculation over who would perform by saying "the rumors are true" to her 63 million Twitter followers on Friday morning.