Two US drone strikes killed 15 militants today in a lawless tribal belt in Pakistan, where a land route for NATO supplies was blocked for a third consecutive day, officials said. In the first attack four missiles hit a house used by militants in Dashgah village, killing six people.

The United States has apologized for an experiment conducted in the 1940s in which U.S. government researchers deliberately infected Guatemalan prison inmates, women and mental patients with syphilis. In the experiment, aimed at testing the then-new drug penicillin, inmates were infected by prostitutes and later treated with the antibiotic.