Stranded passenger return as European skies open

Work colleagues Jaqueline Wood (L) and Tara Roe Gammon, embrace as they pose for the media after returning from Costa Rica via Madrid, at Heathrow Airport in west London April 21, 2010. Europe's skies were opened for business on Wednesday, but with so many planes having been grounded by the pall of volcanic ash spreading from Iceland it could take days, or weeks, to clear the backlog. [Agencies]