NATO said that a bomb has killed four coalition service members in southern Afghanistan, according to AP. The deaths bring to five the number of NATO troops killed on Friday. Another service member died in a separate bombing earlier in the day, also in the south of the country. The coalition has incurred nine deaths in Afghanistan since the start of the year. At least 544 NATO troops died in Afghanistan in 2011. It was the second deadliest year for coalition troops in the 10-year war.
