US NASA said it was grounding the US space shuttle fleet after a large piece of foam insulation was discovered to have broken off from the fuel tank of the Discovery shuttle on liftoff. Britain British police arrested the first of four suspects in last week's failed bombings in London, as newspapers reported that the July 7 suicide attackers, who killed dozens of people, left behind a stash of 16 vicious bombs. Egypt Egyptian investigators have found connections between the deadly bombings in Sharm el-Sheikh and another wave of attacks last October on Sinai resorts further north. US-NKorea The United States maintained that North Korea should abandon all nuclear programs, including a uranium enrichment scheme that Washington accuses the Stalinist state of developing. Iraq-Algeria The group of Al-Qaeda's Iraq frontman Abu Musab al-Zarqawi said it had executed two Algerians kidnapped last week in the latest killing of Arab diplomats in the war-torn country. Iraq Visiting US Defense Secretary Donald Rumsfeld urged Iraqi leaders to speed up efforts on the new constitution, as the commander of US forces in Iraq said he believed his troops could be reduced substantially by early 2006.