Dead in Iraq 23rd March, 2008 : The number of United States military personnel killed in Iraq since the US-led invasion has passed the 4,000 mark. The latest to die were the four soldiers whose vehicle was blown up by a bomb in southern Baghdad today. A fifth soldier was wounded in the attack, which took place about 3 p.m. E.T. This milestone has come just days after Americans marked the fifth anniversary of the war's start.

reform bill into law, President Obama has signed his healthcare bill, which has been hailed as the most expansive social legislation in decades, saying it enshrines "the core principle that everybody should have some basic security when it comes to their health care. Having signed the measure, the Patient Protection and Affordable Care Act, during a ceremony in the East Room of the White House, he spoke to an audience of of the Democratic lawmakers who have riden the legislative process. They interrupted him repeatedly with cheers, applause and standing ovations.