busiest airports. a southwest flight nearly slamming into the control tower. >> go around. go around. fly runway heading, climb and maintain 2,000. climb and maintain 2,000, 2,000. >> reporter: federal investigators say severe weather -- including high windshear -- forced that plane with 153 passengers and crew onboard to veer offcourse at new york's laguardia airport last month. the pilots aborting the first landing, performing a go-around. on the second landing attempt, the flight path shows the plane coming alarmingly close to the control tower. >> continue climbing, southwest 147. and when able, say a reason why you were, like, not on the approach. southwest 147, you with me? >> yep, just trying to work things out here, southwest 147. >> reporter: air traffic control saying the plane was not aligned with the runway. >> it was, like, east of the final. he was not going to land on the runway. >> reporter: that flight diverting to baltimore, where it landed safely. and david, southwest tells abc news