The United Nations is pushing Yemen’s warring parties to agree on a six-month truce extension, two sources familiar with the talks said, which would be the longest in the seven-year-old conflict as international pressure grows on both sides to end the war. Peace efforts gained a boost after US President Joe Biden visited Saudi Arabia last week, where he announced an agreement with the Saudi leadership to “deepen and extend” the ceasefire expiring on August 2. The war has pitted a coalition led by Riyadh against Yemen’s Iran-aligned Houthis since 2015. #NewYork#ReutersThe United Nations is pres…