David Cameron is officially stepping down as Britain’s Prime Minister, handing over the reins to Theresa May. She is the second woman to hold the position, more than three decades after “Iron Lady” Margaret Thatcher. NBC’s Kelly Cobiella reports for TODAY that although May was against the Brexit vote, it now falls to her to lead the country out of the European Union, saying “we’re going to make a success of it.” (Run time: 2:43)