Qatar and the United States are on the verge of finalising an enhanced defence cooperation agreement, top US diplomat Marco Rubio said on Tuesday, after Israel's attack on Hamas political leaders in Qatar last week drew widespread condemnation. The attack in Doha was especially sensitive as Qatar is a close US ally and home to the biggest US military base in the Middle East. Qatar has been hosting and mediating ceasefire talks - alongside Egypt - since the Gaza war started nearly two years ago. Rubio, who was on his way to Doha from Tel Aviv, called for Qatar to continue its role as a mediator between Israel and Hamas to reach a ceasefire in the Gaza war, saying there...