A plane flies past smoke plume from the eruption of the Grimsvotn volcano, under the Vatnajokull glacier in southeast Iceland May 21, 2011. Airlines began cancelling flights to Britain late on Monday because of an ash cloud from an Icelandic volcano reaching its airspace, although experts expected no repeat of travel chaos from an eruption a year ago. Picture taken May 21, 2011.[Xinhua/Reuters Photo]