Smoke rises from the Grimsvötn volcano under the Vatnajokull glacier in southeast Iceland on May 21. Ash from a massive plume of smoke from Iceland's most active volcano could spread south to parts of Europe next week. The eruption has so far hit only Iceland, which closed its international airspace. Jon Gustafsson/Reuters
Smoke rises from the Grimsvötn volcano in Iceland on May 21. Halldora Kristin Unnarsdottir/AP
Smoke plumes from the Grimsvötn volcano, which began erupting on May 21 for the first time since 2004. Iceland closed its main international airport and canceled domestic flights as a powerful volcanic eruption sent a plume of ash, smoke, and steam 12 miles into the air. Jon Gustafsson/AP
In this image taken from amateur video, smoke from the Grimsvötn volcano is seen from a plane on May 21. Amateur video via APTN/AP
Smoke rises from the Grimsvötn volcano on May 21. Jon Gustafsson/AP
A policeman gives directions at a roadblock at the town of Kirkjubaejarklaustur on May 22. Iceland's most active volcano erupted on May 21, hurling a plume of ash and smoke far into the sky, which aviation officials were closely monitoring after another volcano shut European airspace for days last year. Ingolfur Juliusson/Reuters
A car drives on a highway immersed in darkness due to ash fallout outside the small town of Kirkjubaejarklaustur, Iceland, on May 22. Ingolfur Juliusson/Reuters
Sheep are seen at a farm during the ash fallout in Mulakot, Iceland, on May 22. Ingolfur Juliusson/Reuters
Footprints mark the surface of ash outside a gas station in Kirkjubaejarklaustur, Iceland, on May 22. Ingolfur Juliusson/Reuters
The sun shines through an ash fallout at a highway outside Kirkjubaejarklaustur, Iceland, on May 22. Ingolfur Juliusson/Reuters
For Microsoft and other US tech companies, a lawsuit over e-mails stored in Dublin is an important test case to demonstrate their willingness and ability to guard customer data from government prying in a post Snowden-era.
ByJaikumar Vijayan, Correspondent
A dispute between Microsoft Corp. and the Department of Justice over e-mails stored on a Microsoft server in Dublin could end up reshaping US electronic privacy laws and defining the limits to which domestic statutes are applied abroad.