spacex's starship prototype exploding on impact during its attempted landing and what we're learning right now. the deadly chemical plant explosion. families for a time ordered to shelter in place. the f-16 crashing in michigan. the search tonight for the missing pilot. the storm from new york up into new england and now a new system brewing from denver to chicago and moving east. and our made in america christmas. we asked for your one thing. and tonight, the list is growing. good evening and it's great to have you with us here on a very busy wednesday night. and as we come on tonight, we are just hours away now from that crucial public hearing, the committee that will advise the fda whether to grant emergency approval for the pfizer vaccine here in the u.s. of course, it's been approved in the uk. vaccinations under way. it was approved today in canada. and tonight, you'll hear from a doctor right here on that