Cheers for Egypt's new president, Abdel Fattah Al-Sisi, in Cairo's Tahrir square.

Sisi was sworn-in at the Constitutional Court Sunday, after winning the election with 97 percent of the vote last month.

(SOUNDBITE) EGYPT'S NEW PRESIDENT, ABDEL FATTAH AL-SISI, SAYING:

"In the name of God I swear that I will be loyal to the republican system and will respect the constitution, take care of the nation and maintain the nation's independence, its unity and security."

These Egyptians watched the inauguration from a cafe.

(SOUNDBITE) (Arabic) CAFE VISITOR, SULTAN, SAYING:

"I swear this is happiness, for us and for all Arabs. This represents all Arabs. He will solve a lot, God willing."

Sisi now faces staggering challenges in a country where street demonstrations have helped to topple two leaders in three years.

After the inauguration, people celebrated on the streets of Cairo.

One woman says she hopes Sisi will lead Egypt down a prosperous