Federal investigators have cleared two doctors in California and Texas of any wrongdoing in the death of actor Heath Ledger.

The Drug Enforcement Agency interviewed the doctors earlier this week about prescriptions found in Ledger’s apartment and determined they did not prescribe him the two most powerful drugs – Oxycontin and Vicodin, the New York Post reports. The doctors did meet with Ledger but prescribed him other medications, according to investigators.

Britney Spears is spending more quality time with her sons.

Preston, 2, and Jayden, 17 months, spent more time at their mother’s house on Wednesday morning – the third visit Spears has had with her children since lawyers for the singer and her ex-husband Kevin Federline reached a visitation agreement on Feb. 22.

Spears’s recent visits with her boys have been full of hugs and affection. “Kids this age are amazingly resilient, and the very close bond that Britney has with her children is apparent,” a source says.

Angelina Jolie has penned an op-ed article urging the United States to help Iraqi refugees who have been displaced by the war. In The Washington Post piece titled, “Staying to Help in Iraq,” the actress and goodwill ambassador for the United Nations High Commissioner for Refugees says American support is key to addressing the humanitarian crisis, which has displaced more than 4 million people. Of the 2 million refugees within the country, 58 percent are under 12 years old, according to Jolie. The 32-year-old actress, who recently visited the war-torn country, writes, “What we cannot afford, in my view, is to squander the progress that has been made. In fact, we should step up our financial and material assistance.”