Welcome back. i m alex witt. richard lui and louis burgdorf, as well. tensions overnight as the u.s. began moving parts of its miss and he will defense system to a site in soeruth korea. and the u.s. is conducting joint military drills with seoul. the uss karl vin a schlt schlts region conducting exercises with japan. and north korea had live fire drills but so far no nuclear test. lawyers for aaron hernandez have filed a motion to vacate his conviction in the murder of odin lloyd. massachusetts law allows charges to be expunged if the defendant dies while the case is under appeal as is the case with hernandez. dean of the massachusetts school of law telling usa today that