The Bill and Melinda Gates Foundation will still be led by its namesakes after their divorce, but the foundation announced Wednesday a two-year trial period to see how effectively the pair can work together. If they can’t, French Gates would resign from the foundation as co-chair and trustee. She would receive personal resources from Gates for her philanthropic work, but this money would not come from the foundation’s endowment. The pair also said today it contributed an additional $15 billion to the foundation’s endowment, marking their largest contribution since 2000.