The Trump administration is touting its export policy for unmanned aerial systems as a win for American companies, but some industry representatives say the government still hasn't fixed ongoing restrictions that hinder business. Last week's announcement reversing decades-long arms control policy came with much uncertainty about drone exports -- especially to countries where competition with Chinese providers is greatest -- and didn't lessen co-production regulations or address other demands. Seeking more export freedom as militaries worldwide shift away from manned...