DUBAI -- An Emirates flight from India with 300 people on board, including 6 Americans, crash landed at Dubai's main airport on Wednesday, sending black smoke billowing into the air and halting all traffic at the Middle East's busiest airport. Authorities said all passengers were evacuated safely. Dubai-based Emirates said the accident happened around 12:45 p.m. local time as Flight EK521 was arriving from the southern Indian city of Thiruvananthapuram.