Probably no week is an easy one to sit behind the desk in the Oval Office, but the next seven days may be some of Barack Obama’s toughest. President Obama will take his show back on the road this week, for what may be the most difficult diplomatic challenges of his young presidency. In only four days, Obama will dive into the politics of the United Nations, where the world’s leaders will be arriving this week. He will host the G-20 in Pittsburgh, as the planet’s most powerful gather to discuss the state of the economy. All the while, pressure is heating up in a number of hot spots worldwide as the Mideast peace process stalls and the U.S. continues to consider how to confront nuclear threats from Iran and North Korea.