The US national debt has reached a new milestone, now standing at $40 trillion. This record high is attributed to various factors, including defense costs and social programs. Additionally, interest on the deficit has also played a role in the debt surpassing this threshold.

Further details about the national debt and its implications are available. The factors contributing to the debt, such as defense costs and social programs, highlight the complexity of the issue.

For more information on the US national debt and its current state, further reporting can be found through the source.