161 depleted uranium missiles have been recovered in southern Serbia yet no recovery has been made in Kosovo due to the legal restrictions on the Serbian army. The missiles were left in Reljan, near Presevo after the 1999 NATO bombing campaign. During the 78-day air strikes on Serbia's predecessor Yugoslavia in 1999, the NATO dropped 31,000 missiles and bombs containing depleted uranium, a kind of radioactive toxic material that has been linked to Gulf War syndrome and spiraling levels of cancer and birth deformities in Iraq. In Kosovo, the NATO has identified some 112 sites where it acknowledges using depleted uranium munitions. NATO has not given the government in Belgrade a comprehensive list of the bombing sites. The army cleanup operation in Reljan cleared all of the 12 hectares of contaminated grounds within months. A total of 2.4 cubic meters of contaminated soil has also been collected and removed. The Serbian government has funded the cleanup operation in the Reljan site with €350,000 (US$450,000).