Israeli Prime Minister Benjamin Netanyahu has ordered troops to prepare to enter the overcrowded Gazan city of Rafah, even as a new round of talks aimed at securing a truce with Hamas were set to open Thursday in Cairo.Netanyahu announced the order after rejecting Hamas's response to a ceasefire proposal at the centre of intense recent diplomatic efforts, though visiting US Secretary of State Antony Blinken insisted on Wednesday that he still saw "space for agreement to be reached".