If you work in the academy as postdoc and your J1 visa is about to end then you have to file a change of status before your J1 visa ends.

You can submit an expedited request to USCIS based on urgent humanitarian reasons, severe financial loss, compelling the US government...

The most common US visa rejection reasons for B1/B2 tourist visas are insufficient ties to the home country, financial insufficiency....

If H1B or L1 visa holders are laid off, fired, or terminated from their job, either voluntarily or involuntarily or due to massive job cuts.

To extend a tourist visa in the USA beyond 6 months for parents, you must file Form I-539 online or by mail, an application to extend...