US President Barack Obama has said that changes need to be made regarding the policies currently in place controlling access to weapons. Joined for the press conference at the White House by Vice President Joe Biden, he defended the second ammendent which permits Americans to keep and bear arms. However, he stressed that controls must be in place to avoid those deemed unsafe in society from being allowed purchase guns. Little was done during his first term in office. A tightening of gun restrictions has been called for by many Americans following the massacre of 20 children and six adults at Sandy Hook Elementary in the state of Connecticut on Friday.