US President Donald Trump on Thursday extended a pair of immigration bans that block many "green card" applicants and temporary foreign workers from entering the country. Trump justified the widely criticised bans saying they are needed to protect US workers amid the pandemic-battered economy. The bans, which were issued in April and June, were set to expire on Dec. 31, but will be extended until March 31, 2021. A large number of businesses have opposed the ban on certain foreign workers. President-elect Joe Biden has criticized the restrictions, but has not yet said whether he would immediately reverse them.