Here's some basic information for you when it comes to travel to Yemen...
OFFICIAL NAME
Republic of Yemen
CAPITAL
Sanaa
OFFICIAL LANGUAGE
Arabic
FLAG
The flag of Yemen is three equal horizontal bands of red (top), white, and black; similar to the flag of Syria, which has two green stars and of Iraq which has three green stars (plus an Arabic inscription) in a horizontal line centered in the white band; also similar to the flag of Egypt, which has a heraldic eagle centered in the white band.
MONEY
TIME
BUSINESS HOURS
RELIGION
Muslim including Shaf'i (Sunni) and Zaydi (Shi'a), small numbers of Jewish, Christian, and Hindu