Wafik S. El-Deiry: I wore my chemistry tie today in honor of your visit to Providence and Brown University

Wafik S. El-Deiry: I wore my chemistry tie today in honor of your visit to Providence and Brown University

Wafik S. El-Deiry: I wore my chemistry tie today in honor of your visit to Providence and Brown University

Wafik S. El-Deiry: I wore my chemistry tie today in honor of your visit to Providence and Brown University

Wafik S. El-Deiry: I wore my chemistry tie today in honor of your visit to Providence and Brown University

Wafik S. El-Deiry: I wore my chemistry tie today in honor of your visit to Providence and Brown University

Wafik S. El-Deiry: I wore my chemistry tie today in honor of your visit to Providence and Brown University

Wafik S. El-Deiry: I wore my chemistry tie today in honor of your visit to Providence and Brown University

Werner Reutter