Hi, Long weekend.....sorry for the late response. If your brother is already a US Citizen, yes, he can apply for your greencard. The only concern you may have is that you will fall under the forth cataegory of family sponsored petitions. The waiting times for family sponsored petitions range from 4-18 years as of recent waiting dates. However, this backlog applies mostly to applicants from India, mexico, china, phillipines.Therefore, it is likely that applicants from Nepal will have to wait for shorter period. for details: nepalilawyer@gmmail.com www.anlus.wordpress.com