Saturday’s crash at SFO is having an impact on flights at Portland International Aiport. Click here to see flight delays and cancellations.SAN FRANCISCO (AP) — An Asiana Airlines flight packed with more than 300 people slammed onto the runway while landing at San Francisco airport Saturday and caught fire, forcing many to escape by sliding down the emergency inflatable slides and into a trail of metal debris as flames tore through the plane. At least two people who were found outside the wreckage died in the crash, while another 182 people were taken to hospitals, many with minor injuries, authorities said. Forty-nine people were reported to be in critical condition, San Francisco International Airport spokesman Doug Yakel said. South Korea’s Ministry of Land, Infrastructure and Transport said the two dead were Chinese.As the plane approached the runway from the waters of San Francisco Bay around noon, travelers in the terminals and others eyewitnesses could see that the aircraft was swaying unusually from side to side and that at one point the tail seemed to hit the ground before breaking off. Kate Belding, who was jogging a few miles away, said she thought: “Oh my God. That plane is crashing.” By the time the flames were out, much of the top of the Boeing 777’s fuselage had burned away. The tail section was gone, with pieces of it scattered across the beginning of the runway. One engine appeared to have broken away. Emergency responders could be seen walking inside the burned-out wreckage. This frame grab from video provided by KTVU shows smoke rising from an Asiana Airlines flight that crashed while landing at San Francisco Airport on Saturday.