Yes, they traveled in June 28-29 via united MAA-DEL-EWR-CVG. In chennai the airport officials argued about valid visa, i had given my parents this link
https://travel.state.gov/content/tr...id-19-travel-restrictions-and-exceptions.html, in the second para, it states immigrant visas are exempt.....officials created drama but let them board in chennai, at delhi, they just checked, no issues,
EWR immigration- they had a 6 hr window but immigration took about 4 hrs...they missed their connection....most of the immigrants that day went though secondary processing....GC received exactly in a month.