London – Many European flights took off yesterday for the first time in these days, but the chaos is far from over. London airports were closed, an accumulation of mass was growing and scientists feared another eruption in Iceland. London airports – including Heathrow, the busiest in Europe – not reopen until today (4/21/10), and forecasters said more delays are possible if the volcanic ash cloud remained over the country. Still, it was the day before the volcano erupted in Iceland last week that travelers have had a glimmer of hope.